Automatic 70L Sludge Dewatering System 380V ISO9001

Product Description

Complete Sludge Dewatering System

The centrifugal sludge dewatering and drying equipment produced by our company, usually used for sludge thickening and dewatering, is mainly composed of a LW series decanter centrifuge (or screw press), a full-automatic flocculant preparation and dosing device, a sludge crushing and cutting machine, a sludge feed pump, a dosing pump, a shaftless screw conveyor, a flowmeter, a control valve and a complete full-automatic control system. Characterized by advanced structure, reasonable configuration, high degree of automation, continuous airtight operation, safe and reliable operation, etc., it is applicable to the treatment of municipal sewage, rural sewage, hospital sewage, etc. as well as various types of industrial sewage.

 

System Working Principle

The mixed sludge from the municipal sewage that has undergone primary sedimentation and secondary sedimentation normally has a solid content of about 2-3%. It is then dewatered and thickened with a decanter centrifuge (or belt filter, screw press) and the discharged sludge has a moisture content of about 80-85%. Later, the sludge enters the sludge low-temperature heat pump heating and dehumidification equipment for dehumidification and drying, and the moisture content of the treated sludge drops to about 30%. Thus, the harmless treatments of the sludge, such as incineration or utilization after pyrolysis, can be conducted.

 

Scope of Application

For a long time, due to the stress on water treatment and the ignorance of sludge treatment, at present, only about 30% of the sludge is safely disposed of. Large amounts of wet sludge are transported out randomly, simply landfilled or piled up. Exposed to the air, the sludge is prone to stink and attract mosquitoes, and cannot be used as fertilizer.

 

The requirements of the Action Plan for Prevention and Treatment of Water Pollution and other relevant national laws and regulations for sludge treatment and disposal have continued to increase in recent years. Therefore, the sludge shall further undergo stable and harmless resource treatment and disposal, and the moisture content of sludge for landfill, incineration, land use, etc. shall be lower than 60%.

 

PAM Solution Automatic Dosing Device

JY series PAM solution automatic dosing device, mainly composed of an automatic dry powder dosing system, an automatic quantitative water injection device, a vortex prewetting device, a liquid level monitoring device, a stirring device, pipelines, valves, etc., is a system device integrating dry powder storage, feeding, wetting, dissolution and curing. The system under full-automatic control can be used for batch and continuous preparation of high-molecular polymer solution. It is widely used in sewage treatment, drinking water purification, industrial wastewater treatment, papermaking, ore smelting, etc.

Working Principle

PAM powder passes through a high-efficiency vortex wetting device, is then mixed with water, fully stirred and dissolved into a PAM solution with a concentration of 0.1~0.5%. Later, the solution is cured and put in the storage tank for standby application.

 

The curing time of the prepared solution depends on the nature of the agent, the required flow rate of the process and the effective volume of the device, and generally, the dissolution and curing time of the solution shall reach 45-60min to ensure the dissolution and curing effect of the solution and the full curing of the agent.

Feed water according to the set flow rate and at the same time, automatically add quantitative dry powder; wet the power in the prewetting device, put it in the dissolution tank for mixing and dissolution; when the liquid level reaches the overflow height, put it in the curing tank for stirring and curing and at the same time, stir the solution in the dissolution tank; when the liquid level reaches the overflow height, put it in the storage tank for storage and standby application; after the curing, when the solution in the storage tank rises to the high liquid level, use the prepared PAM solution. After the first preparation, the device supplies solution required for the process while preparing a new solution, which can meet the needs of continuous operation for 24 hours.

 

Technical Parameters of JY Series Solution Automatic Dosing Device

Items	Model
	JY500	JY1000	JY1500	JY2500	JY4000	JY6000
Effective volume(m3)	1030	1160	1570	2640	4500	6500
Dosing chamber volume(L)	70	70	70	70	70	70
Dosing motor power(kw)	0.18	0.18	0.18	0.18	0.18	0.18
Preparation capacity(L/h)	500	1000	1500	2500	4000	6000
Proportioning concentration(%)	1-3	1-3	1-3	1-3	1-3	1-3
Water inlet pressure(Mpa)	0.3	0.3	0.3	0.3	0.3	0.3
Water inlet flow rate(m3/h)	0-3	0-3	0-3	0-4	0-4	0-4
Maximum dosage(Kg/h)	0.85-3.6	0.85-3.6	1.7-7.2	2.5-9	3.4-14.4	4.5-20
Tank material	304	304	304	304	304	304
Power supply(V)	380v/50hz	380v/50hz	380v/50hz	380v/50hz	380v/50hz	380v/50hz
Weight(kg)	400	420	500	600	750	880
Dimension(mm)	2000*1000*1830	2200*1000*1830	2200*1200*2150	2600*1450*2150	3000*1500*2200	4000*1750*2500

 

Note: The maximum dosage refers to the dosage per hour at the minimum - maximum speed of the dry powder dosing spiral under the premise of full curing.

 

In actual operation, the speed of the dosing spiral can be adjusted according to the concentration requirements to adjust the dry powder dosage; the inlet water pressure (flow rate) can be adjusted to meet the preparation concentration requirements and output requirements.

 

On special occasions, the design can be changed to increase the dosage of dry powder per unit time. To increase the dosage per hour, please put forward such request while placing the order.

 

Sludge Dewatering System – Screw Press

Scope of Application

Screw press is widely used for sludge dewatering in such industries as municipal sewage, food, beverage, slaughter and breeding, printing and dyeing, papermaking, leather and pharmaceuticals.

 

Structure and Operating Principle

The separation unit of the screw press is composed of a fixing ring and a floating ring which are stacked on each other with a small gap in between. The spiral shaft passes through it and rotates to drive the floating ring to move circumferentially. The water in the flocculated mud pie is filtered out through the gap between the fixing ring and the floating ring, and the floating ring moves circumferentially to prevent blockage. The gap between the fixing ring and the floating ring becomes smaller along the direction of the cake outlet from the thickening zone to the dewatering zone, and forced dewatering is achieved under the back pressure formed by the back pressure plate of the sludge outlet.

 

The sludge is sent by the sludge transfer pump to the sludge inlet, and the flocculant is metered and sent to the flocculation mixing tank, where the sludge is fully stirred with the flocculant and flocculated. After being flocculated into large floccules, the sludge enters in the spiral separation unit from the spiral sludge inlet. The floccules in the spiral separation unit are under gravity thickening while moving towards the dewatering zone under the action of the spiral. The gap between the floating ring and the fixing ring in the dewatering zone is narrowed, and the sludge is further pressurized and dewatered under the action of the back pressure plate, and is discharged from the sludge outlet as cake.

 

Technical Parameters

Items	Model
	DL201	DL351	DL352	DL353
Motor power of dehydration unit (kw)	0.25	1.1	2.2	3.3
Motor power of flocculation mixer (kw)	0.55	1.1	1.1	1.1
Treatment capacity (kg DS/H)	40-60	100-150	200-300	300-450
Power supply (V)	380V,50hz	380V,50hz	380V,50hz	380V,50hz
Machine weight (kg)	580	1340	2080	2820
Dimension (mm)	2700*1000*1850	3115*850*2175	3115*1215*2175	3115*1700*2175

 

LW Sludge Dewatering - Dedicated Decanter Centrifuge

 

The centrifuge is composed of a bowl rotating at high speed, a scroll that runs in the same direction as the bowl and has a certain speed difference, as well as a differential, a base, a feeding and discharging system, etc. The sludge and flocculant enter the bowl after being mixed in a specially designed feeding chamber. Under the action of centrifugal force, the flocculated particles are quickly separated and sedimented in the sedimentation zone, and the clarified liquid is discharged through the overflow hole at the end of the bowl. The sedimented solids, after being squeezed and dewatered by the BD baffle, is pushed by the scroll conveyor to the drying section of the bowl for further compression, and then discharged through the slag outlet. The dewatering time of the solids in the bowl can be controlled by adjusting the differential speed between the scroll and the bowl.

 

Skid-mounted Sludge Dewatering Integrated System

Application of LW Series Decanter Centrifuge in Sewage Plant

 

Main Features

• Bowl speed: The bowl is designed with high speed and large separation factor, which can effectively clarify tiny particles with size ≥5μm.
• Length-diameter ratio: The actual effective length-diameter ratio of the bowl is ≥4, and the sedimentation distance is long, which increases the clarification and dewatering time of the sludge in the bowl.
• BD baffle: There is a circular baffle between the scroll sedimentation section and drying section, which squeezes the sludge in the settling section into the drying section, so that the moisture content of the sludge is lower; meanwhile, it cuts off the connection between the sludge and the clarified liquid. The depth of the liquid pool can be greater than the slag outlet, and the deeper the liquid pool is and the longer the process takes, the better the clarification effect is.

 

Technical Parameters

Items	Model
	LW355*1460	LW450*1800	LW530*2120	LW650*2800
Bowl Diameter (mm)	350	450	530	650
Bowl Speed (r/min)	4000	3200	2800	2500
Separation Factor	3100	2580	2300	2270
Treatment capacity (m3/h)	8-15	20-35	30-50	40-70
Main motor power (kW)	22	30	55	70

 

Electrical control system

• The PLC (programmable controller) is employed in the control system of the sludge dewatering equipment for the full-automatic or manual operation, operation monitoring, fault alarm and interlocking protection, etc. of the centrifugal flocculant preparation and dosing device, cutting machine, feed pump, flow meter, etc.
• The system start/ stop, automatic/manual operation, separation, cleaning and shutdown functions can be carried out according to preset programs and personalized settings;
• It can automatically adjust the feed volume with the constant torque;
• It can automatically increase or decrease the differential speed to prevent material blocking according to the changes in the pushing torque;
• The hydraulic differential system automatically adjusts the differential speed according to the pressure change of the hydraulic driving system to control the differential speed;
• It automatically proportions the flocculant preparation concentration according to the predetermined concentration, and has the function of continuous and stable quantitative dosing;
• A large-size color touch screen is available for operation and it can display the working parameters of the equipment in real time.

 

Crushing and Cutting Machine

This machine is mainly used to smash large pieces of wood, textiles, plastics, rubber, bones, leather, glass, etc. in the sludge (with a solid content of ≤5) so that the feed pumps, centrifuges and instruments in the downstream system can operate normally. It is featured by high treatment capacity, low energy consumption, long service life, etc.

 

Single-screw Pump

The pump is a positive displacement transfer pump, whose screw with large lead, great tooth depth and small spiral inner diameter pushes the conveyed medium from the suction end to the discharge end along the axial direction. Made of highly wear-resistant materials, it is mainly used for the transfer of sludge with a solid content of 0.2~5% and flocculants, and its discharge flow rate can be adjusted by a frequency converter.

 

Shaftless Screw Conveyor

LS shaftless screw conveyor is mainly composed of a driving device, shaftless spiral blades, a U-shaped replaceable wear-resistant liner plate and a rack. It is mainly used to transport the dewatered cake from the discharge outlet of the centrifuge to the outdoor storage yard or the transportation vehicle. The whole work is done in an airtight state to keep the environment clean.

 

Sludge Low-temperature Heat Pump Drying - SDDR Integrated System

SDDR sludge low-temperature heat pump heating and dehumidification equipment is sludge deep dewatering equipment, which can effectively treat the sludge with a moisture content of 85% or lower to a minimum of 10%. It is widely used in the treatment of municipal sludge, industrial sludge and solid waste, hazardous waste and other sludges.

 

Working Principle

Inject dry air into the airtight drying chamber, and take out the moisture in the sludge through humidity exchange, then use the evaporator to condense and remove the moisture in the air, and at the same time, take advantage of the heat pump principle to recover the latent heat of moisture condensation, use it to heat the dry air and blow the air back into the drying chamber. Since the heat recovery technology is adopted, no waste heat is emitted in the airtight drying mode.

 

Technical Advantages

Modular design

Skid-mounted or vehicle-mounted design makes it unnecessary to conduct on-site assembly construction

Heat pump and fan are integrated, avoiding pollution, easy to disassemble and assemble

Tail gas treatment module is integrated, so no separate skid is required

 

Eco-friendly

There is no chemical addition, so the subsequent disposal of sludge is not affected

The equipment runs in an airtight manner at low temperature, and the hot air is recycled and reused, which is environmentally friendly

The tail gas treatment device is selectively assembled at the solid discharge port, preventing bad smell at the drying site

New refrigerant ODP=0, GWP value is extremely low, working noise <55 decibels

 

Energy conservation

Energy recovery rate is close to 100%, and 2.5~4.2kg sludge can be dewatered with just 1 kilowatt-hour of electricity

Equipment can be customized according to customer requirements to provide the best solution for energy conservation and consumption reduction

 

Reliability

The equipment runs at low speed and uses corrosion-resistant materials

Mobile terminal monitoring of the equipment can be realized with just one key

It has software setting protection, failure prediction, early warning and shutdown functions

 

Company profile

Concentrated

Jiangsu Huada Centrifuge Co., Ltd., a subsidiary of SCIMEE (stock code: 300425), was established in 1993 in Zhangjiagang, an emerging port city in China. It is a leading domestic centrifuge manufacturer. Over the years, it has always focused on the research and development, production and sales of filtration and separation machinery, and has insisted on building an open and win-win cooperation system to lead the industry with scientific and reasonable technological innovation, win the market with specialized and standardized customer service, guarantee quality with excellent management and provide solutions to the solid-liquid separation problems for each customer with concentrated attention.

 

Specialized

In response to the individual needs of customers, it integrates automation and humanized design in the design and manufacturing process based on its experience, and provides customers with practical and feasible separation technical solutions and products by optimizing the centrifuge technologies and modular design.

 

Innovative

Huada holds a dominant position in the domestic centrifuge market, which to a great extent is attributed to its leading role (leading both users and peers). Although it has a number of new products and new technologies, it is not content with having centrifuges meet the separation requirements in the initial use. It is more concerned about the long-term performance of the centrifuge and would like to solve problems such as high productivity, high washing rate, low crystal breakage rate, low residue rate and low energy consumption for customers and provide customers with safe, intelligent and environmentally friendly separation equipment and solutions.