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Hazardous Wastes Horizontal Decanter Centrifuge Double Motor Variable Frequency

Categories Horizontal Decanter Centrifuge
Brand Name: WP
Model Number: LW
Place of Origin: CHENGDU,CHINA
MOQ: 1unit
Price: Negotiable
Payment Terms: L/C, T/T
Supply Ability: 30UNITS/MONTH
Delivery Time: 1TO 3MONTH
Packaging Details: IRON SUPPORT FRAME
Materials: AISI321, AISI316, AISI316L SAF2205
Motor voltage: 380/460/600V
Motor frequency: 50/60Hz
Color: blue or green
Operation: Fully automatic control mode
Application: Hazardous wastes Solid-liquid separation
Drive: Double motor variable frequency
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    Hazardous Wastes Horizontal Decanter Centrifuge Double Motor Variable Frequency

    Scroll Discharge Hazardous Waste Disposal Horizontal Decanter Centrifuge

    Solid-Liquid Separation Of Hazardous Waste Disposal Systems

    Hazardous wastes refer to the wastes with hazardous characteristics that are listed in the National Hazardous Waste List according to the Law of the People's Republic of China on the Prevention and Control of Environment Pollution Caused by Solid Wastes, or dangerous wastes determined using the state prescribed standards and methods for identification of hazardous wastes.

    With the development of industry, the amount of hazardous wastes discharged from industrial production is increasing. It is estimated that the annual amount of hazardous wastes generated worldwide is 330 million tons. Due to the serious pollution and potential grave impacts of hazardous wastes, the hazardous wastes in industrially advanced countries have been called “political wastes”. The public is sensitive to hazardous wastes and opposes the establishment of hazardous waste disposal sites in their living areas. The disposal of hazardous wastes is expensive, and some companies are trying to transfer hazardous wastes to industrially underdeveloped countries and regions.

    II. Harm of hazardous wastes

    Destroy the ecological environment. The dangerous wastes discharged and stored at will pollute water bodies and soil under the long-term penetration and diffusion of rainwater and groundwater, so as to reduce the environmental function level of the area.

    Affect human health. Hazardous wastes cause poisoning through ingestion, inhalation, skin absorption, eye contact, or lead to dangerous events such as burning and explosion; long-term hazards include long-term poisoning, carcinogenicity, teratogenicity, and alteration caused by repeated exposure.

    Restrict sustainable development. The pollution of the atmosphere, water source, and soil caused by hazardous wastes untreated or through unregulated disposal will also become a bottleneck of restricting economic activities.

    III. Hazardous waste treatment process

    Gasification melting process is adopted. The system comprises feeding and preparing device + gasifier + secondary combustion chamber + residual heat exchanger (SNCR) + chiller + bag dust remover + alkali eluting sulfur tower + wet electrostatic precipitator + flue gas heat exchanger +flue gas burner+low temperature SCR + induced draft fan + chimney. The treated flue gas is discharged into the atmosphere through the chimney to ensure that the concentration and discharging rate of gases polluting the environment are lower than the standard emission requirements.

    The working principle is that the hazardous waste enters the gasification furnace after pretreatment, and is subjected to pyrolysis and gasification under an anoxic reducing condition. After that, the gasified product enters the melting furnace for high-temperature combustion to generate glassy slag. Compared with conventional incineration, the gasification and melting technology is completely harmless and remarkable in capacity reduction, and recovers energy and by-products.

    IV. Core equipment of gasification slag dewatering – centrifuge

    Installation convenience

    Compared with the conventional filter-type equipment (plate-and-frame filter, belt filter, etc.), the centrifuge is compact and efficient, covering only about a third of land, needless of auxiliary gas source, high-pressure water, and with simpler pipe structures at the inlet and outlet. And it features fully enclosed operation and more user-friendly operating environment.

    Operation stability

    Filter type equipment (plate-and-frame press, belt filter, etc.) is used to remove solid particles by filtration. Viscous solid particles easily cause clogging of the filter cloth, reducing the dehydration performance, and the filter cloth after bonding cannot be reused. The centrifuge, however, relies on the difference in specific gravity of the solid-liquid itself. The centrifugal force generated by high-speed rotation quickly separates solid from liquid, making the production line realize continuous and stable operation, and lowering the subsequent maintenance cost and the labor intensity of operators.

    Centrifuge wear-resistant measures and means (one of the key technologies for stable operation of the centrifuge and for reduction of later-stage operating cost)

    The glassy slag produced via high-temperature combustion is extremely hard. Replaceable hard alloy protective tiles (pieces) are furnished at all the flowing and slag discharging positions of the centrifuge, and the selected hard alloys are more wear-resistant and more durable than ordinary cemented carbide.

    Fully automatic control mode

    Programmatic automatic control mode from start to separation to cleaning to stop reduces human intervention during the operation of the equipment and lowers the requirements on operator quality; the intelligent control mode together with sensors for measuring vibration and temperature and speed has improved the capability to predict and solve equipment operation failures.

    ★ Double-motor double-frequency conversion common DC bus

    The main and ancillary motors of the centrifuge are controlled by a high-performance vector inverter. The ancillary motor is always in the generator state under the differential speed. The inverter adopts common DC bus technology. The auxiliary inverter can convert the electric energy generated by the ancillary motor into the power source to drive the main motor, thereby achieving the purpose of energy conservation.

    Through the double-motor double-frequency conversion control technology, the stepless adjustment of the centrifuge differential speed can be realized. It features fast reaction speed, accurate torque detection, stable torque control, and low failure rate.

    V. Three-phase centrifuge model and technical parameters

    Centrifuge modelmm
    Drum diameter mm
    Length-diameter ratio
    Separation factor
    Differential speed rpm
    Main motor power kW
    Ancillary motor power (kW)
    Throughput m3/h
    Weight (kg)
    Boundary dimension mm (L x W x H)
    LW250×1025B2504.135001-507.5-113 ~41~211502300×750×1100

    Note: The throughput is related to material characteristics;

    Control method: ① direct control using an inverter (double-motor double-frequency conversion mode);

    ② PLC+ touch screen control (intelligent control mode)

    Material: AISI321, AISI316, AISI316L SAF2205, etc.

    Safety protection: devices for measuring vibration and temperature, emergency stop button, and measures to prevent faulty operation such as hood not being covered.

    VI. Applications
    Solid-liquid separation realized by using a high-efficiency LW series two-phase centrifuge can reduce the liquid content of the slag phase, facilitate transportation, and increase the combustion heat value.

    Separation performance:

    The water content of the slag phase after centrifugation can be ≤55, and its total volume is reduced by over 80% compared to that before separation;

    The solid content of the liquid phase after separation can reach ≤0.1~0.2%;

    Quality Hazardous Wastes Horizontal Decanter Centrifuge Double Motor Variable Frequency for sale
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