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TREATMENT OF SPENT EMULSIONS AND SPENT OIL

Spent /waste oil is generally denoted as an oil which, due to changed properties, no longer meets the original requirements (e.g. oiliness), and whose characteristics cannot be further enhanced by treatment. Potential sources are spent oils from engines and gearboxes, oily emulsions, bilge water, tank residuals etc. These waste oils have different densities, viscosities and impurity levels.

Waste oils can be treated or refined by means of chemical-physical processes or used as high-grade fuels in the cement industry or in smelters. The waste oil ordinance stipulates the priority of the material treatment of waste oils by means of refining in as far as this does not conflict with technical and economic as well as organizational constraints. The composition of the waste oil as well as the level of contaminants in the waste oil likewise determine the method of disposal.

If the waste oil is to be incinerated, all impurities such as solids and water must be removed beforehand. During incineration, the water content lowers the calorific value. The solids lead to deposits in the boiler, clogging of the nozzles and diminish the thermal efficiency.

Waste oil can be treated by means of mechanical centrifugal technology. Decanters and self-cleaning separators can be used for separating solids and water from waste oil.

TREATMENT OF LUBRICATION AND HYDRAULIC OIL

Clean oil for smooth operation – Water and dirt particles act as a catalyst for the lube or hydraulic oil used. If condensation or leakage water enters the oil through the narrow gaps of the hydraulic system, corrosion can easily result.

Apart from water, particles produced as a result of wear to the metal components as well as dust from the environment can enter the liquid. In time, the quality of the oils will be impaired by the impurities and liquid foreign matter like water which will ultimately lead to blockage and malfunctions in the system.

The result is machine failure and the associated costs for maintenance and loss of production.

The contaminated oil must be replaced with fresh oil. This creates additional costs for waste oil disposal as well as for the purchase of new oil.

To ensure problem-free functioning of the lubricating and hydraulic systems, a lube oil and hydraulic oil free from water and foreign matter must be used. With the aid of centrifugal technology, these fluids can be rid of solids and water. The separators do this very efficiently. They remove metal particles up to 1 µm.

Steel works or paper mills, for example, improve their efficiency using this kind of oil treatment.

TREATMENT OF CLEANING LIQUIDS

Separation instead of disposal environmental protection by washing lye cleaning and oil recycling

Certain surface treatment processes in the metal-processing industry require thorough cleaning. Treatment of the cleaning agents used not only provides environmental protection in the long term; it also significantly reduces costs.

Centrifugal separators are suitable for cleaning washing lye. They process the washing lye of a hot defatting bath and the resultant drawing oil from the deep drawing process.
Features:
━ Significantly reduced washing lye requirement
━ Reduced disposal costs
━ Improved cleaning effect as the circulating washing lye is always clean
━ Solids and oil are discharged in concentrated form
━ Lower costs for cleaning the washing lye circulation system
━ High surface quality due to uniform cleaning effect

TREATMENT OF COOLING LUBRICANTS

Centrifugal separation for coolant emulsion and cooling oil

Coolant emulsions are used both in a wide range of cutting and non-cutting processes. They serve to reduce the frictional or forming energy, heat dissipation as well as flushing the filings away from the point being machined.

Coolant emulsions are made up of various constituents (emulsifiers, stabilizers, anti-corrosive additives, EP additives and mineral oil components). These emulsions are more or less susceptible to putrefaction and decomposition. Contaminants such as metal abrasives and extraneous liquids (hydraulic oil, lubricating oil) accelerate the aging process, i.e. degradation of emulsifiers, acid formation, discolouration plus odour nuisance and skin irritations caused by handling.

The primary preventive measure against aging is absolute cleanliness in the installation. To keep the coolant emulsions in a usable condition, solids and tramp oil must therefore be removed as soon as possible.

Both tasks can be fulfilled simultaneously with separators. The solid fines and tramp oil are separated in one single step.

STATIONARY AND MOBILE SOLUTIONS

Protection of the environment and responsible handling of the available resources require innovative technology. For decades, Huading Separator has developed and constructed mobile systems for flexible application. All major process steps with the associated equipment are consolidated as a single unit in a truck trailer or in a container for even more flexibility. The entire piping is installed and the system is automated and ready for immediate use. High-performance systems which provide substantial improvements.

The advantages are obvious. Mobile systems equipped with innovative, high-performance decanters ensure a high degree of economy through their continuous operation, high throughput capacities, optimum dewatering and flexibility. This is supplemented by modern control technology and simple process integration. The optimum conditions for reduced volumes of sludge and low-cost, economical disposal.

The advantages of mobile systems become apparent wherever rapid action or flexible applications are required. Whether from municipal waste water treatment plants for handling peak loads to the various fields of industry for fast action in tight situations. Here the requirements are different from municipal sludge dewatering or thickening. A lower throughput is often required. This applies both to the transport and to the space required by the unit in the plant.

Huading Separator has developed the mobile concept further with the new plant systems in container construction. Simpler logistics world-wide. Any truck can take and transport the standard container module. Production has also been economically optimized by standard components. With these new, compact systems, Huading Separator has met the current demands of the market. Maximum flexibility, fast and reliable separating technology, cost-optimized designs and simple process integration. A simple and fast solution.

Drinking Water

Drinking water is a valuable resource. Even so, only a small amount of water is used for consumption.

Drinking water is gained either from the groundwater or from surface water. With growing populations and increasing levels of pollution, the employment of surface water is increasing constantly. Surface water is treated by centrifugal separating technology to remove the undesired constituents.

Heavily polluted surface water is treated by various chemical processes. Decanters are used to dewater the sludge produced in this process. The proportion of mineral pollutants in the raw water and the types of chemicals used for precipitation are highly significant for the dewatering process.

Clarifying decanters are employed to dewater the sludge in drinking water treatment plants. These were developed for high-performance clarification and the highest possible dewatering of the solids.

Amongst other features, this is ensured by the high bowl speed and a high scroll torque in conjunction with a differential speed regulation operating proportionally to the solids loading. The closed design of the machines in conjunction with an enclosed installation prevents the escape of aerosols, protecting people and the environment.

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Industry Waste Water

Wastewater technology integrated into production processes for resource-minimized production is a broad spectrum of applications for Huading Separator. Recycling, making a material useful in a circulatory production system by separation, is a task for special decanter centrifuges in diverse industrial applications.

The use of high-alloy stainless steels for all components in contact with the product ensures a high degree of durability and long service life. Innovative features such as high g-forces, large clarifying surfaces, optimized feed systems, special drives and a degree of dewatering which can be adjusted externally during operation ensure optimum clarifying performance and highly economic operation.

The fields of application are as diverse as the industries themselves. Whether in the food industry, chemicals and pharmaceuticals, the computer industry, energy management, the paper industry or agriculture – separating technology with decanters and separators provides clear-cut solutions in all fields of application.

The fields of application extend from the treatment of atomic power plant wash water through glass powder recovery to the purification of wastewater from cellulose production.

The smallest particles of slag produced during degassing in the melting of iron ore are returned to the process by decanters. In the automotive industry, decanters recover lacquer residues from the lacquering shop wastewater.

The applications in the food industry are also diverse. Whether in the treatment of wash water in the starch industry or in the treatment of waste water from dairies, the edible oil industry or the beverage industry, separators and decanters always provide a clean solution.

━ Asbestos sludge
━ Brewery waste water
━ Chemical waste water
━ De-inking wash water
━ Electrocoagulation
━ Faecal sludge
━ Galvanic sludge
━ Hydroxide sludge
━ Industrial waste water
━ Juice waste water
━ Kaolin waste water
━ Lacquering sludge
━ Manure
━ Nuclear waste water
━ Oil refinery waste water
━ Pulp and Paper Sludge
━ Quartz sludge
━ Refinery residue
━ Starch waste water
━ Tannery waste water
━ Uranium waste water
━ Vegetable waste water
━ Wash water
━ Xylase waste water
━ Yeast waste water
━ Zinc oxide waste water

THICKENING OF SEWAGE SLUDGE

THICKENING OF SEWAGE SLUDGE

International water conservation policy has focused especially on advanced waste water treatment. The inevitable consequence: a worldwide increase in the sewage sludge volume. How can the municipalities dispose of the growing volume in an environmentally acceptable manner and cost-effectively? The solution is highly efficient dewatering leaving as few residuals as possible. Because the higher the solids concentration of the sewage sludge is, the more economical the further processes are.

Designed and constructed for high clarification efficiency and maximum solid concentration, the different decanter models are not only products of Huading Separator experience but also incorporate the constantly changing results from the field. The result: high-performance decanter centrifuges that not just meet all the demands made on them, but also surpass them in many respects, achieving maximum benefit for the user.

Advantages of mechanical thickening with centrifuges include a reduction in the load on the digester and improved digestion with higher gas yields, and improved volatiles destruction.

Regulatory restrictions on phosphorous and nitrogen levels have made the thickening of waste activated sludge necessary. Mechanical thickening cuts capital costs substantially and results in up to a 90% decrease in sludge volumes. Advantages of mechanical thickening with centrifuges include a reduction in the load on the digester and improved digestion with higher gas yields, and improved volatiles destruction.

Dewatering of Sewage Sludge

The objectives of water protection policies make constantly increasing requirements for more thorough wastewater purification. Therefore, a further increase in the volume of sewage sludge produced worldwide is anticipated in the future.

Both municipalities and industry are obliged to dispose of the growing quantities of sewage sludge in an environmentally safe and economical manner.

The disposal of sewage sludge must be secured in the future, employing the latest standards of technology to ensure that valuable materials are recycled. The optimum and economical dewatering of sewage sludge is a central step for all recycling possibilities.

The method of disposal and the associated requirements on the degree of de-watering determine the economy of a dewatering unit. Any increase in the concentration of solids is beneficial in terms of reducing landfill and transport costs.

To allow the sewage sludge to be recycled or disposed of in line with the corresponding requirements, optimum dewatering is necessary before drying, incineration or dumping. The decanters from the Huading Separator fulfil these requirements by a high g-force (separation efficiency) and optimum torque control.

A high degree of dewatering guarantees a substantially reduced sludge volume and thereby significant cost reductions for:

━ Transport
━ Landfill
━ Energy consumption during drying or incineration

Decanter centrifuges

Model Bowl ID（mm） Speed （rpm） L/D G-force Motor(kW） Weight (kg）
LW186 186 6000 4 3750 5~7.5 1050
LW250 250 4400 4.3 2710 7.5~11 1200
LW300 300 4400 4.5 3250 7.5~11 1400
LW355 355 4200 4.5 3500 22 2200
LW400 400 4200 4~4.5 3950 30 2600
LW450 450 3400 4.5~5.0 2900 30~37 3600
LW500 500 3400 4 3250 37~45 4300
LW530 530 3000 4.3 2680 45 5000
LW580 580 2500 4.3 2030 55~75 7000
LW650 650 3100 4.2 3500 75~90 10000
LW720 720 2500 4 2520 90~110 12000
LW900 900 3600 4 2000 110-160 16000

 

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MINERAL PROCESSING

In nowadays, more and more centrifugal separation equipments used for mining, and mineral processing. Whether processing calcium carbonate, kaolin or titanium dioxide, crud treatment, PLS clarification or recovery of organic components: the separating technology machines, systems and process lines from Huading Separator set standards for performance, service life as well as for economic and environmentally sound operation.

Centrifugal separation solutions from Huading Separator concentrate customer benefit:
━ Optimize process results
━ Reduce production costs permanently
━ Maximize production capacities
━ Protect people and environment

Huading Separator provide highly efficient and durable solutions for mining, mineral processing and pigment production. Including:

Inorganic pigments processing:
━ Calcium carbonate
━ Kaolin
━ Titanium dioxide
Hydrometals (such as copper, uranium, cobalt, nickel, zinc):
━ Crud treatment / clay treatment
━ PLS clarification