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Working Principle

Screw type sludge dewatering press (Screw Press) is structured with a filter element that consists of two types of Rings: a Fixed Ring and a Moving Ring; and a screw that thrusts the filter element and transfers and pressurizes the sludge.

  • Slurry Dewatering Sewage Dry Drainage Process

    Slurry Dewatering Sewage Dry Drainage Process

    Technical Parameter
    Bandwidth Of Filter( mm )
    Host Power
    Complete Power Set
    Filter Belt Speed (m/min)
    Hydraulic Pressure( map )

    Outward Size
    Weight  (T)
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  • Technological Process

    Technological Process

    1. Sludge flocculation

    In order to improve the dewatering of sludge, improve the nature of the filter cake, and increase the permeability of the material, it is necessary to carry out chemical treatment on the sludge, this machine uses the unique device of "flocculation granulation mixer in water" in order to achieve the effect of chemical dosing flocculation, this method not only has good flocculation effect but also saves a large number of pharmaceuticals, with low operating costs and very obvious economic benefits.

    2. Gravity concentration and dewatering area

    The sludge is evenly fed into the mesh belt through the fabric hopper, the sludge runs forward with the filter belt, and the free water flows into the receiving tank through the sincere belt under the action of self-weight, the gravity dewatering can also be said to be the highly concentrated section, and the main function is to take off the free water in the sludge, so that the mobility of the sludge is reduced, and to make preparation for further extrusion.

    3. Low-pressure/medium-pressure dewatering zone

    After gravity and dewatering, the sludge mobility is almost completely lost. With the forward running of the filter belt, the sludge is brought into the porous roller by the wedge zone, the spacing between the upper and lower filter belts is gradually reduced, the filtrate starts to overflow from the two sides of the filter belt, and with the running of the filter belt, the pressure is gradually increased. As the belt runs, the pressure gradually increases. The function of the wedge zone is to prolong the gravity dewatering time, increase the extrusion stability of the flocs, and prepare for entering the pressure zone.

    4. To the pressure silver (or with) high-pressure dehydration area

    The sludge enters the high-pressure zone after leaving the medium-pressure zone, forming the filter cake with high solid content. Material from the wedge-shaped area into the pressure area, the material in this area by the extrusion, along the running direction of the belt pressure with the reduction of the diameter of the extrusion of the clip and increase the volume of the material by the extrusion of contraction, the sludge in this area by the 1-3 groups of pairs of pinch rollers (or belt) extrusion, after strong extrusion of the volume of the substantial contraction of the sludge within the gap of the free water is fully squeezed out to form a cake, and continue to go forward to the end of the high-pressure zone after the high-pressure After the high pressure, the water content of the filter cake can be minimized.

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  • Belt Pressure Filter

    Belt Pressure Filter

    The belt press filter is mainly composed of a driving device, frame, press roller, upper filter belt, lower filter belt, filter belt tensioning device, filter belt cleaning device, and discharging device. gas control system. electrical control system. sludge is pumped into a dynamic (static) mixer, mixed with the anion (yang) ion flocculant solution added at the same time fully reacted, and then coagulated into a larger flocculent mass. The surface water of the material is separated into free water. The material is transported through the filter net of the first gravity pre-dewatering zone (or on the belt concentrator) and gravity is removed. Aftergravity dewatering, the fluidity of sludge becomes worse obviously, but it is still difficult to meet the requirement of sludge fluidity in the pressing dewatering section. Therefore, a wedge-shaped pre-pressing dewatering section is added between the pressing dewatering section and the gravity dewatering section of the sludge, and the sludge is dewatered by slight extrusion in this section. Removal of free water from its surface almost completely loses its fluidity, which ensures that sludge will not be extruded in the pressing dewatering section under normal conditions, creating conditions for smooth pressing dewatering.

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  • Sludge Machine Treatment Efficiency

    Sludge Machine Treatment Efficiency

    There are many different types of sludge machines in the sludge treatment field that are used to treat and dispose of sludge (the solid waste produced during wastewater treatment processes). The mud-water mixture entering the sludge machine has a solid content of 0.5-5% and a moisture content of 99.5-95%. The solid content of the sludge is generally 22%-17% and the moisture content is 78%-83% (general sewage treatment equipment). clay machine)

    Common types of sludge treatment machines

    Sludge Thickener: used to reduce the moisture content in thin sludge, thereby reducing the sludge volume.

    Sludge Dewatering Machine : used to further remove the water from the concentrated sludge and turn the sludge into drier solid matter, usually using mechanical pressing, centrifugal separation or other methods.

    Sludge Dryer: used to further dry the dehydrated sludge, usually through heating or drying airflow.

    Sludge pyrolysis equipment: used to pyrolyze sludge at high temperatures and convert it into ash, which is usually used for large-scale treatment and disposal.

    Anaerobic Digester: The organic matter in the sludge is decomposed into biogas and digested sludge through the action of microorganisms, which can be used for energy production or sludge reduction treatment.

    Sludge anaerobic oxidation equipment: similar to a digester, but operates under aerobic conditions, helping to decompose organic matter in the sludge.

    Centrifuge: Use centrifugal force to remove water from sludge to obtain higher dry solid waste.

    Belt Press: Uses belt filtration and pressing technology to dewater sludge and is suitable for large-scale treatment.

    Sludge Conveyors: Equipment used to transfer sludge from one treatment stage to another, which can be screw conveyors, belt conveyors, etc.

    The selection of these machines depends on the nature of the sludge, the scale of treatment and the desired final treatment results. In wastewater treatment and sludge management processes, multiple types of sludge machines are often used to complete different treatment steps. If you need it, please contact us to choose the equipment that suits you.

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  • In The Daily Operation Of The Screw Stacking Machine, You Need To Pay Attention To The Following Matters

    In The Daily Operation Of The Screw Stacking Machine, You Need To Pay Attention To The Following Matters

    Regular maintenance: Regularly inspect and maintain the screw stacking machine, including cleaning the screw shaft, checking bearings and seals, to ensure the normal operation of the machine. Follow the manufacturer's maintenance recommendations.

    Handle proper feed: Ensure the sludge entering the screw stacker is appropriate, including sludge concentration and properties. If the sludge concentration is too low, the dewatering effect may be affected.

    Adjust operating parameters: Adjust the operating parameters of the screw stacker according to different situations, such as screw shaft speed, extrusion degree and mud discharge speed. Optimization of these parameters can improve dewatering performance.

    Regular cleaning: Clean all parts of the screw stacker, especially the screw shaft and screw plate, to prevent build-up and clogging.

    Monitor current and voltage: Regularly monitor the current and voltage of the screw stacker to ensure that the motor is operating properly. Abnormal current or voltage may indicate a problem with the machine.

    Processing of dehydrated concentrate: Process the dehydrated concentrate to ensure that it meets environmental requirements. Occasionally, concentrates may require further processing or disposal.

    Train operators: Train operators to ensure they understand the normal operation and operating points of the screw stacker. Training helps reduce incorrect operations.

    Regularly check the mud discharge device: Ensure that the mud discharge device of the snail stacker is operating normally and eliminate possible faults in a timely manner.

    Record operating data: Record the operating data of the snail stacker, including feed volume, mud discharge volume, current and voltage, etc., in order to analyze and monitor performance.

    The above matters will help ensure the normal operation of the snail stacker and improve the dehydration efficiency. According to the specific machine model and sludge characteristics , an operation and maintenance plan suitable for the machine will be further developed. If you encounter problems, please consult us or professional technicians for help in time.

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  • Operating Procedures And Daily Operational Precautions For The Spiral Sludge Dewatering Machine

    Operating Procedures And Daily Operational Precautions For The Spiral Sludge Dewatering Machine

    Operating Procedures and Daily Operational Precautions for the Spiral Sludge Dewatering Machine

    1 . Inspection before starting the equipment

    The screw stacker can efficiently dewater sludge, reduce waste volume, and reduce waste disposal costs. It usually has an automated control system that can adjust operations as needed, reducing operator intervention and reducing labor costs. In order to ensure the good operation of the sludge dewatering screw press, equipment inspection is essential.

    First check whether there are any debris in the mixing tank , secondly check whether the filter body has drained out sludge , and finally check whether there are large pieces of mud at the head of the spiral shaft.

    2 . Equipment usage steps

    PAM flocculation agent into the preparation system and turn on the stirring device at the same time:

    (1) Use a nozzle to manually clean the moving and fixed ring pieces on the main body of the snail stack for about two minutes .

    (2) Turn on the drive motor of the main body of the sludge dewatering screw press and check whether its rotation direction is correct. The main body of the snail stacker needs to be sprayed for 1-2 minutes.

    (3) Turn on the flocculant supply pump and start working. At the same time, the mud pump and flocculation stirring motor must be turned on and run together;

    (4) The above operations are all ok. Start adjusting the mud inlet volume , the rotation speed of the main spiral shaft , and the plate spacing of the mud outlet bucket to optimize the mud outlet volume and sludge moisture content.

    (5) Finally, check whether there is any abnormality in the rotation of the screw shaft , whether the mud level in the mixing tank is too low or too high, and whether there is any abnormal noise from any part of the equipment during operation. If the above abnormality occurs, stop the operation immediately and conduct maintenance.

    3. How to choose the model of sludge machine

    Determine treatment capacity: The most important thing is to determine the amount of sludge you need to process. This is usually measured in terms of processing capacity per hour (usually expressed in cubic meters/hour or tons/hour). Make sure the sludge dewatering screw press model you choose has enough processing power to meet your needs.

    Understand the properties of sludge: Different types of sludge may require different models of sludge dewatering screw press. Understand the properties of the sludge you are handling, including solids content, particle size and concentration , so you can choose the right snail stacker.

    Consider dryness requirements: Determine your dryness requirements for your dewatered sludge. Different models of sludge dewatering screw press can achieve different degrees of dehydration, thus affecting the final sludge dryness.

    Understand the power and energy requirements: Understand the power and energy requirements of your chosen sludge dewatering screw press to ensure your facility can meet these needs.

    When choosing a sludge dewatering screw press, it is best to consult a professional engineer or wastewater treatment expert for advice on the best option. We can provide customized advice based on your specific circumstances and needs to ensure that the sludge dewatering screw press will meet your requirements .

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  • What Is A Screw Stacking Machine?

    What Is A Screw Stacking Machine?

    What is a screw stacking machine?

    Screw stacking machine is the abbreviation of screw stacking sludge dewatering machine . It is widely used in municipal treatment projects and water treatment systems in petrochemical, light industry, chemical fiber, papermaking, pharmaceutical, leather and other industrial industries.

    This equipment integrates a fully automatic control cabinet , a flocculation conditioning tank , a sludge concentration and dehydration body and a liquid collecting tank . It has the characteristics of efficient and stable operation and can automatically complete efficient flocculation , sludge concentration , press and dehydration without any supervision. , filtrate reflux or discharge and a series of actions , making it widely used in the field of sludge treatment.

    The Advantages of Sludge Dewatering Screw Press

    Efficient dehydration : The screw stacker can efficiently separate water from sludge through the principle of mechanical extrusion. This results in discharged sludge with a higher solids content, reducing wastewater treatment and disposal costs.

    Compact design : Screw stacking machines usually have a compact design and occupy a relatively small footprint. This is very beneficial for sludge treatment facilities with limited site space.

    Automated control : Modern snail stackers are often equipped with advanced automated control systems that can monitor and adjust the dewatering process to ensure optimal performance and energy efficiency.

    Stability and reliability : The mechanical structure of screw stacking machines is relatively simple, so they are usually very stable and reliable and require less maintenance.

    Strong adaptability : The screw stacking machine is suitable for various types of sludge, including sewage treatment plants, industrial sludge, urban sludge, etc. They can handle sludge of different properties and concentrations.

    Energy conservation : Compared with traditional sludge dewatering methods, snail stackers are generally more energy efficient because they do not require large amounts of chemicals to assist dewatering.

    Reduce waste disposal costs : By increasing the solids content of the sludge, the screw stacker can reduce the costs of waste treatment and disposal, such as reducing transportation and landfill expenses.

    NIHAO Sludge Dewatering Screw Press

    The screw-stacked sludge dehydrator is equipped with a specially designed screw-stack body. It has an exquisite design and a variety of product models , covering ultra-small models with a processing capacity of 0.5kg-DS/h to ultra-large machines with a processing capacity of 1,320~ 1,360kg -DS/h. type , providing the most appropriate technical solution according to the customer's actual processing capacity needs to achieve the goal of efficient and energy-saving dehydration. You are welcome to consult our professional design team at any time to choose a suitable sludge dehydrator for you.

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  • Ingenious Screw Press Sludge Dewatering Machine in Wastewater Treatment

    Ingenious Screw Press Sludge Dewatering Machine in Wastewater Treatment

    Item Number: NH-301
    DS Standard: 30-50KG/H
    Theoretical Reference For Sludge Treatment
    Volume: 5m3/h(MLSS-10000mg/L)
    Dims: 3100 x 900 x 1800 mm
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    In the field of wastewater treatment, innovations are emerging and processes are being revolutionised to ensure that our environment is protected. One notable innovation is the Screw Press Sludge Dehydrator. Sleek in design and efficient in function, this remarkable machine has revolutionised the field of sludge management.
    Sludge is the semi-solid residue produced after wastewater treatment and is a major challenge for wastewater treatment plants. Sludge is not only bulky but also has a high moisture content, making it very cumbersome to transport and handle. This is where the Screw Press Sludge Dewaterer comes into play, offering an ingenious solution to effectively reduce the water content of sludge.
    At the heart of the Screw Press Sludge Dewaterer is the use of a unique mechanism to separate the water from the sludge. The whole process starts when the sludge enters the feed section of the machine. Here, the screw shaft gradually conveys the sludge to the dewatering section. As the sludge advances, the space between the screw shaft and the inner wall of the machine narrows, forcing the water to escape. This controlled compression effectively separates the water from the sludge, resulting in a drier, more manageable product.
    One of the most impressive aspects of the Screw Press Sludge Dewaterer is its compact design that maximises efficiency in limited space. Conventional methods of sludge dewatering often require large numbers of settling tanks or centrifuges, which take up a lot of space in treatment plants. In contrast, this equipment is able to achieve high levels of dewatering in a very small footprint, which is a reflection of its clever design.
    In addition, the screw press sludge dewatering machine shows great adaptability in treating all types of sludge. Whether it is activated sludge or industrial waste, its adaptable design ensures effective dewatering in all wastewater treatment situations. This flexibility not only increases its practicality, but also contributes to cost savings and resource optimisation.
    Environmental considerations are at the heart of wastewater treatment and screw press sludge dewatering machines are closely linked to the goal of sustainable development. By reducing the water content of the sludge, the machine reduces the amount of waste that needs to be disposed of, which in turn reduces transport costs and the environmental impact. The reduction in the amount of waste also creates the possibility of reusing or repurposing the dewatered sludge, further contributing to the principles of a circular economy.
    In conclusion, the screw press sludge dewatering machine is a remarkable innovation that plays an important role in wastewater treatment technology. Its innovative design, efficient water separation mechanism, compact footprint, and adaptability to a wide range of sludge types prove its key role in modern sludge management practices. With the growing global focus on sustainable solutions, this equipment demonstrates how technology can harmonise with environmental protection, paving the way for the creation of cleaner, healthier ecosystems.
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  • Sludge Dewatering Machine for Brewery and Distillery

    Sludge Dewatering Machine for Brewery and Distillery

    Item Number: NH-202
    DS Standard:18-30KG/H
    Theoretical Reference For Sludge Treatment Volume: 3m3/h(MLSS-10000mg/L)
    Dims: 2600 x 950 x 1450 mm
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    How does the sludge dewatering machine for breweries and distilleries react when combined with MBBR media?

    Combining the sludge dewatering machine for breweries and distilleries with MBBR (Moving Bed Biofilm Reactor) media produces the following reactions:

    1. Improved sludge treatment effectiveness: MBBR systems utilize biofilm attached to moving bed media to efficiently degrade organic matter in wastewater. When the organic matter treated by the MBBR system enters the sludge in the sludge dewatering machine, it has relatively lower organic content. This enables the sludge dewatering machine to effectively remove moisture from the sludge generated by breweries and distilleries, resulting in drier solid sludge.

    2. Reduced sludge volume and quantity: Through the treatment in the MBBR system, organic matter in the wastewater is efficiently removed, resulting in a lower organic load entering the sludge dewatering machine. As a result, the volume and weight of the sludge are reduced, allowing the dewatering machine to handle and reduce the sludge volume more efficiently, leading to lower treatment costs and disposal requirements.

    3. Enhanced sludge stability: The biofilm in the MBBR system effectively degrades organic matter in the wastewater, converting it into more stable sludge. This increases the stability and processability of the sludge entering the sludge dewatering machine, improving dewatering effectiveness and the feasibility of subsequent disposal.

    4. Reduced odors and environmental impact: The treatment of organic matter in the wastewater by the MBBR system effectively reduces organic content and decomposition by-products. This leads to a reduction in odors and environmental pollution risks in the sludge. The use of the sludge dewatering machine further reduces moisture in the sludge, minimizing odors and environmental impact, and improving comfort and quality of life in the vicinity of breweries and distilleries.

    In summary, when the sludge dewatering machine for breweries and distilleries is combined with MBBR media, it improves sludge treatment effectiveness, reduces sludge volume and quantity, enhances sludge stability, and reduces odors and environmental impact. This combined approach enables more comprehensive, efficient, and environmentally friendly wastewater treatment and sludge management.

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  • Sludge Machine Applications Food and Beverage

    Sludge Machine Applications Food and Beverage

    Item Number: NH-131
    DS Standard: 6-10KG/H
    Theoretical Reference For Sludge Treatment Volume: 1m3/h(MLSS-10000mg/L)
    Dims: 1960 x 800 x 1150 mm
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    Sludge machine applications food and beverage

    Sludge dewatering machines also find applications in the food and beverage industry for the management of sludge generated during the production and wastewater treatment processes. Here are some specific areas where sludge dewatering machines are used:

    1. Food Processing: Food processing plants often produce organic-rich sludge as a byproduct of various processes, such as washing, peeling, cooking, and dewatering of fruits, vegetables, and grains. Sludge dewatering machines help in reducing the water content of this sludge, making it easier to handle and dispose of.

    2. Brewery and Distillery: Breweries and distilleries generate sludge during the fermentation and filtration processes. This sludge contains residual yeast, grain solids, and other organic materials. Dewatering machines are used to separate the water from the sludge, allowing for more efficient disposal or further treatment.

    3. Dairy Industry: Dairy processing plants produce sludge from activities like milk processing, cheese production, and whey treatment. The sludge typically contains high organic content and fats. Sludge dewatering machines can effectively remove water from the sludge, facilitating proper management and disposal.

    4. Beverage Manufacturing: Beverage manufacturing plants generate sludge during the production of various beverages, such as soft drinks, juices, and bottled water. Sludge dewatering machines can be employed to reduce the moisture content of the sludge, making it easier to handle and dispose of in an environmentally friendly manner.

    5. Meat and Poultry Processing: Meat and poultry processing plants generate sludge from activities like meat washing, trimming, and processing. This sludge often contains fats, proteins, and other organic matter. Sludge dewatering machines are used to separate water from the sludge, allowing for efficient management and disposal.

    The specific type of sludge dewatering machine used in the food and beverage industry may vary depending on factors such as the characteristics of the sludge, the volume of sludge generated, and the specific requirements of the facility. Common types of sludge dewatering machines mentioned earlier, such as belt filter presses, centrifuges, screw presses, and filter presses, can be adapted to suit the needs of food and beverage processing plants.

    By employing sludge dewatering machines, the food and beverage industry can effectively manage sludge, minimize waste, comply with environmental regulations, and improve overall operational efficiency.

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nihao industry-leading advantages


Steel Cover And PMMA Windows Make Safer

Stainless steel Cover with two handles on the above of the main boby, and strengthen polymethyl methacrylate Glass windows in both sizes, The cover make the equipment safer and the worker safter when running. Also the worker can check the machine carefully when running throught the Windows.

Ensure Safety


Steel Sprinker System Get Longer Life

The Sprinker system is very important to the dewatering system, it is the most easy to demager system when use, all of the parts of Juntai Screw Press sprinker system are made by SS304, including the pipe, the inject and the nozzel, it will never need replace the spayer nozzel.

Longer Life


Detailing Guaratee Quality

Nihao fucus on every detailing of the Screw Press, such as the snoothy surface, the cable protect, the wire stable, Radius and snoothy angles, welded line and all the detailings, Juntai try to do as best as we can ,and this is also a way to ensure the quality.

Focus Detailing


Cobalt Alloy Wear Layer Make Screws Harder

All of Screws of Nihao Dewatering machine are welded a cabalt Alloy Wear layer which are much harder than that of SS304, and with the Aobalt Alloy waer layer, the screw is harder and canbe used many more years.

Harder Screw


Germany Schneider Electric Control Cabinet

Nihao dewatering machine is installed with German Schneider Electric control box, this high quality control box can better ensure the safety.

Germany Schneider


Pressure Water Gun With Fiberglass Hose Make Clean Easier

All of Screws of Nihao Dewatering machine are welded a cabalt Alloy Wear layer which are much harder than that of SS304, and with the Aobalt Alloy waer layer, the screw is harder and canbe used many more years.

Clean Easier

NIHAO Sludge Dewater Scew Press 6 Technology Advantage
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Equipped with pre-thickening tank and better at dealing with low concentration sludge.

Improved gravity thickening shortcomings and realized high efficient thickening.Flocculation and thickening are integrated, dewater becomes easier.Combine with regulating end plate, sludge concentration can be optimized.

Fixed and Moving rings replace filter cloth.

The rotation of screw shaft pushes the detaching of Moving rings from Fixed rings, which brings self-cleaning processcontinuously and automatically. This enables stable and constant dewatering to take place without depending on high pressure flushing water to prevent clogging. This also enables being ideal for oily sludge, which easily causes clogging and is difficult to treat with other types of dewatering equipment.

Low noise, low vibration, power saving, water saving.

As the main component, the screw rotates very slow at a rate of 2-4rpm, no need large integration like rollers, so that itconsumes very low power and thus environment friendly. The power consumption of screw press is 1/20 of centrifuge which requires rotation at high speed, 1/8 of belt press, which is only 0.01-0.1 Kwh/kg-DS.Its unique self-cleaning mechanism prevents filter mesh from clogging, then no need for huge amounts of water forclogging prevention. The amount of cleaning water required is about 1/115 of belt press and 1/62 of centrifuge.

Reduce infrastructure investment cost, improve treatment effect.

Screw press can directly treat the sludge from aeration tank and second sedimentation tank so no need sludgethickening and sludge storage tank. The infrastructure investment can be greatly saved and the phosphorous release problem is well avoided. Thus the sewage treatment system dephosphorization can be enhanced.Save infrastructure investment also on mixer, air compressor, washing pump and other related corollary equipment.Less footprint occupy, less dewatering plant infrastructure investment.

Fully automatic control, simple operation and management.

Screw press doesn't have any components like filter cloth or filter pore which are easily clogged.The operation is safe and easy. The machine also can be operated automatically by control cabinet.

Wide range of application.

Can be widely used in municipal sewage, food, slaughtering breeding, printingand dyeing, oil chemical industry, paper making, leather, pharmaceutical and other industrial of sludge dewatering.

NIHAO Screw Press Water Serviceable Range

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Special designed Screw Press has wide range of types, the capacity covers from 0.5Kg-DS/h to 1320- 1768Kg-DS/h.

It can deal with waste water including Raw waste water, Activated Sludge Water, Chemical Precipitated Sludge, DAf Sludge.

We can also provide the most suitable technical proposal based on the actual need.

nihao Screw Press Types Selection Reference
Type DS Standard Processing Volume

Theoretical Reference For Sludge Treatment Volume

(specific treatment volume is determined by the flocculation effect of sludge and chemicals)

Low concentration→High concentration 2000mg/L 2000mg/L 2000mg/L 2000mg/L 2000mg/L 2000mg/L
Sludge Treatment Capactiy kg/h kg/h m³/h m³/h m³/h m³/h m³/h m³/h
NH-131 ~6 ~10 ~3 ~1.2 ~1 ~0.5 ~0.4 ~0.2
NH-132 ~12 ~20 ~6 ~2.4 ~2 ~1 ~0.8 ~0.4
NH-201 ~9 ~15 ~4.5 ~1.8 ~1.5 ~0.75 ~0.6 ~0.3
NH-202 ~18 ~30 ~9 ~3.6 ~3 ~1.5 ~1.2 ~0.6
NH-251 ~20 ~35 ~4 ~2 ~1.5 ~1 ~0.8 ~0.4
NH-301 ~30 ~50 ~15 ~6 ~5 ~2.5 ~2 ~1
NH-302 ~60 ~100 ~30 ~12 ~10 ~5 ~4 ~2
NH-303 ~90 ~150 ~45 ~18 ~15 ~7.5 ~6 ~3
NH-351 ~60 ~100 ~30 ~12 ~10 ~5 ~4 ~2
NH-352 ~120 ~200 ~60 ~24 ~20 ~10 ~8 ~4
NH-401 ~90 ~150 ~45 ~18 ~15 ~7.5 ~6 ~3
NH-402 ~180 ~300 ~90 ~36 ~30 ~15 ~12 ~6
NH-403 ~270 ~450 ~135 ~54 ~45 ~22.5 ~18 ~9
NH-404 ~360 ~600 ~180 ~72 ~60 ~30 ~24 ~12
nihao Diffuser Model Screw Press Specification

Spiral Shaft


Mechanical Size Net weight Operating weight







mm*pcs mm mm mm kg kg
NH-131 130*1 1960 800 1150 182 280
NH-132 132*2 2100 850 1150 360 400
NH-201 200*1 2500 800 1450 315 420
NH-201 200*2 2600 950 1450 515 680
NH-251 250*1 2600 850 1500 450 700
NH-301 300*1 3100 900 1800 568 1200
NH-302 300*2 3400 1200 1800 968 2030
NH-303 300*3 3700 14500 1800 1358 2750
NH-351 350*1 3400 950 1900 800 1100
NH-352 350*2 3700 1400 1900 1400 3300
NH-401 400*1 3800 1100 2100 1085 2400
NH-402 400*2 4100 1500 2050 2200 4200
NH-403 400*3 4370 1800 2150 3300 6300
NH-404 400*4 4800 2600 2050 4500 7200
nihao SCREW Standard Configuration and Structure
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NIHAO SCREW (Standard Configuration)

Flow Control Tank Sludge is fed into the Flow Control Tank by sludge pump, and isregulated with the overflow pipe, returning excess volume to the sludge storage tank.


Flocculation Tank Stir and mix the sludge with polymer, forming suitable "floc".


Dewatering Cylinder Conditioned sludge is thickened in the thickening zone of the cylinder,and then the inner pressure increased at the dewatering zone helps sludge being welldewatered.


Discharge Outlet for Sludge Cake Further pressure is applied from the outlet side with theEnd plate, discharging sludge cake with 20+ 5% solids content.



nihao Dosing System

AUTOMATIC POLYMER preparation unit












Dimensions (mm)



NH-500L 50 65 SUS304 0.99 1400 1520 1520 280
NH-1000L 1000 65 SUS304 0.99 2000 1300 1300 410
NH-2000L 2000 65 SUS304 1.36 2400 1520 1520 550
NH-4000L 4000 6 SUS304 1.36 3000 1800 1800 680
NH-5000L 5000 65 SUS304 3.55 4000 1550 1550 960
NH-6000L 6000 65 SUS304 3.55 4000 1800 1800 1050
NH-8000L 8000 65 SUS304 4.65 4500 1800 1800 1280
NH-10000L 10000 100*2 SUS304 4.9 5000 1800 1800 1560

Automatic Polymer Preparation Unit is for powder polymer preparation.designed for homogeneity in flocculantconcentration.

Optimized design can ensure the polymer goes through the maturationprocess using the smallest footprint.

PE POLYMER preparation unit

PE Polymer Preparation Unit is asimple dosing unitmade of PE.The unit is composed of stirringmotor,mixer, dosing port, waterinlet and washing water inlet.lt is low cost which is applicableto small scale,personnelonsiteproject.





Dimensions (mm)



Mixing motor


Dosing pump


NH-500L-PE-1 500 830 1410 1580 1 0.75 0.25
NH-500L-PE-2 1000 830 1410 1580 2 0.75*2 0.25*2
NH-500L-PE-3 1500 2490 1410 1580 3 0.75*3 0.25*3
NH-1000L-PE-1 1000 1120 1720 1706 1 0.75 0.25
NH-1000L-PE-2 2000 2240 1720 1706 2 0.75*2 0.25*2
NH-1000L-PE-3 3000 3360 1720 1706 3 0.75*3 0.25*3
NH-2000L-PE-1 2000 1400 2000 2200 1.65 1.1 0.55
NH-2000L-PE-2 4000 2800 2000 2200 3.3 1.1*2 0.55*2
NH-2000L-PE-3 6000 6200 2000 2200 4.95 1.1*3 0.55*3
nihao Screw Press Inventory and Packaging

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