The stacked screw sludge dewatering machine is a tool for solid-liquid separation through centrifugal force, and it is a tool for processing sludge. Although my country’s sludge treatment technology started late, it has also begun to receive attention in recent years. The stacked screw sludge dewatering machine is also equipped with other equipment, do you know what it is?

Stacking screw sludge dewatering machine dosing:

For a long time, there has been a tendency in our country to pay attention to sewage treatment measures and ignore sludge treatment measures. Due to the late start of sludge treatment technology in my country, sludge treatment equipment is relatively outdated, and investment in sludge treatment is relatively small. The situation of sludge treatment measures is relatively chaotic, and many small sewage treatment measures stations discharge untreated sludge directly, causing secondary pollution. Therefore, it has become a top priority to develop and produce sludge dewatering machines suitable for small and medium-sized sewage treatment facilities, which are economical, practical and easy to operate.


The stacked screw sludge dewatering machine is a new generation of sludge dewatering equipment that does not have a filter device and does not rely on high-speed centrifugal force to achieve solid-liquid evacuation. The main machine of the dehydrator is composed of a spiral urging shaft, multiple fixed laminations and multiple floating laminations, and there is an adjusting gasket between the fixed laminations and the floating laminations. The equipment is composed of two working areas. The sludge inlet is a thickening section. The sludge entering the dehydrator is concentrated and the filtrate produced is discharged from the gap between the dehydration fixed laminations and the swimming laminations. The screw-stacked sludge dehydration The concentrated sludge enters the dehydration section and is further compressed by the screw shaft to be dehydrated into a mud cake and discharged out of the machine.

The stacked screw sludge dewatering machine is automatically controlled from extracting sludge, injecting liquid medicine, and discharging sludge cake through the electric control cabinet. It is linked with the medicine soaking machine, the mud feeding pump, the dosing pump, etc., without the need for personnel to operate the equipment, and the operation will not cause clogging, deviation of the filter belt or other phenomena that affect the safety of the process. run. For the first time, the continuous automatic operation of sludge dewatering in the true sense has been realized.

The dosing device is provided in the form of mechanical and electrical integration layout, which can be divided into fixed type and mobile type (trolley type) in terms of placement. Each type of dosing device is equipped with a stirring system, a dosing system and an automatic control system. . Several fixed skids can be combined into a whole, together with the frequency conversion control system, it can realize on-the-spot control, long-distance automatic control, manual and automatic switching between dosing. It has the advantages of compact structure, small volume, low noise, stable operation, simple installation, and convenient operation and use.

The volume of the solution tank in the dosing device can range from a minimum of 0.1m3 to 20m3, which can be selected according to the amount of dosing. According to the difference of the conveying medium, there are various materials to choose from, such as carbon steel (carbon steel lining rubber), stainless steel, Non-metallic materials (PE, PVC, PP, PTFE), etc. The dissolution tank is equipped with liquid level gauge, low liquid level alarm, valve and other facilities required for automatic operation. A magnetic flap liquid level gauge is installed on the outer wall of the whole body to observe the liquid level in the barrel in real time. There are feeding ports and spare ports on the whole body, and there are discharge ports, sewage outlets, overflow ports, and liquid level gauges on the side of the barrel body. Interfaces and corresponding matching valves. When the liquid level in the barrel is lower than the set low liquid level value, the alarm system is automatically turned on and the dosing pump is suspended.

The dosing device mainly includes feeding system, medicine storage tank, dosing system, power control system, etc. The dissolving barrel is equipped with a liquid level gauge, and the low liquid level reporting process can be manually operated, or through various electrical appliances, instruments, etc. The drug device becomes a mechatronic product and realizes automatic control. Facilities required for automatic operation such as alarms and valves. A magnetic flap liquid level gauge is installed on the outer wall of the whole body to observe the liquid level in the barrel in real time. There are feeding ports and spare ports on the whole body, and there are discharge ports, sewage outlets, overflow ports, and liquid level gauges on the side of the barrel body. Interfaces and corresponding matching valves. When the liquid level in the barrel is lower than the set low liquid level value, the alarm system is automatically turned on and the dosing pump is suspended.


Sludge treatment measures have received increasing attention, direct discharge has been strictly prohibited, and clear requirements have been made for the domestic sewage treatment industry. Increased inspections on industries such as chemical, food, breeding, slaughtering, papermaking, printing and dyeing, etc., and severely dealt with and punished any disorderly rowing phenomenon. The sludge generated after sewage treatment must be dehydrated before it can be transported outside for treatment. As a new and practical screw-stacking sludge dewatering machine, it has been recognized by more and more users and has become a “dehydration artifact” in the sludge treatment industry. Today, let’s talk about the supporting equipment of the screw-stacking sludge dewatering machine.

The dosing device of the supporting equipment of the screw stacking sludge dewatering machine is an essential device for sludge treatment. The sludge is flocculated and agglomerated by adding chemicals and then enters the screw stacking spindle for dehydration. The medicine used is generally PAM, the Chinese name is polyacrylamide, the molecular weight is 1.5 million to 20 million, and the concentration is generally 8%. The organic polymer flocculant has a huge surface adsorption effect by forming larger flocs among the particles, and flocculates the suspended matter in the sewage into alum flowers. The dosing ratio is often the key factor for the dehydration effect, so a suitable dosing device should be selected for snail stacking.

The PAM dosing equipment is composed of a dry powder doser, three dissolving tanks, agitator, metering pump, liquid level gauge, etc. The whole set of equipment is provided with three-stage agitation, so that PAM can fully contact and dissolve with water. The dosing device is relatively simple to use. PAM is added to the dry powder doser, and the medicine is configured by controlling the amount of the spiral tube of the dry powder doser. After three-stage ample mixing, it is added to the water body that needs to be dosed by a metering pump. middle.

The function of the polymer flocculant delivery pump is to transport the dissolved polymer flocculant to the flocculation mixing tank of the dehydrator. The amount of polymer flocculant added can be calculated according to the processing amount of dry sludge of dehydrator, flocculant addition rate and dilution ratio. Select a suitable polymer flocculant delivery pump. In the standard configuration of the dehydrator, the electric control cabinet can control a dosing pump. The addition rate of flocculant is related to the properties of sludge and the type of flocculant. The ideal diameter of alum flower is 5mm, and the dilution ratio can also be adjusted appropriately according to the actual situation. Basically, the dilution ratio is between 0.1% and 0.2%. With the continuous development of various new materials and technologies, many domestic companies have also started a series of innovations and transformations, such as the transformation of screw shafts, non-wearing structures, and industry-specific models.

The function of the screw stacking sludge dewatering machine is to concentrate and dewater the sludge. It mainly includes three parts: the flocculation mixing tank, the screw stacking body and the electric control cabinet. Among them, there is a stirring motor in the flocculation mixing tank, which is mainly used to mix and stir the sludge flowing in from the metering tank and the flocculant input through the dosing pump. The stirring motor can change the stirring speed through the control of the frequency converter. If the speed is too slow, the sludge and flocculant cannot be fully mixed to form alum flowers. If the speed is too fast, it is easy to break the formed alum flowers. There is also a liquid level gauge in the mixing tank. When the dehydrator has no time to deal with the sludge, the liquid level in the mixing tank will gradually rise.

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