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rotary kiln for sludge

rotary kiln incinerator for sludge incineration

rotary kiln incinerator for sludge incineration

Sludge is a common solid waste in daily life, which is commonly found in sewer pipe networks and sewage treatment plants. The amount of sludge waste produced in the industry is huge each year, among which electroplating sludge, leather sludge, pickling sludge, oily sludge, sewage sludge, and other types of sludge discharge are increasing day by day.

The sludge waste contains a lot of harmful substances, including heavy metals, bacteria, pathogens, etc. If it is not treated, it will inevitably have a greater impact on the environment and human health. Sludge treatment came into being under such circumstances. Sludge treatment is the reduction, stabilization, and harmless processing of various types of sludge such as concentration, conditioning, dehydration, stabilization, drying, or incineration.

There are roughly four methods for sludge treatment in the world, namely reclamation, landfill, incineration, and land use. Most landfills are open-air sites. After the rain, a large amount of sludge containing oil that is difficult to degrade organic matter, heavy metals, and pathogenic microorganisms will corrode and penetrate the land, posing safety hazards to the soil, and causing new pollution to the surrounding environment of the city. In Europe, the treatment of sludge through sludge incineration has become a very important way. Due to stricter restrictions on sludge accumulation, incineration of sludge may become the only way to treat sludge.

The sludge incineration process needs to be carried out in a sludge rotary kiln. Sludge waste rotary kiln is a kind of hazardous waste rotary kiln incinerator, which is specially used to treat sludge waste. It is a rotary kiln calcining equipment integrating drying, heating, and calcination. During the sludge incineration process, all germs and pathogens are completely killed by the high temperature in the sludge rotary kiln, and the toxic and harmful organic residues are decomposed by thermal oxidation. The sludge is incinerated through the sludge rotary kiln to achieve the greatest reduction in volume, and the final product incineration ash is obtained. Incineration ash can be used as a raw material for cement production to fix heavy metals in the concrete to prevent them from re-entering the environment.

The internal temperature in the sludge rotary kiln incinerator is generally between 1350-1650, or even higher. The materials in the kiln are in a highly turbulent fluidization state during the incineration of sludge. Therefore, the harmful organic matter in the sludge in the kiln can be fully burned, and the incineration rate can reach 99.999%. Even stable organic matter such as dioxins can be completely decomposed.

Since the feeding point of the dried sludge is in a decomposition furnace higher than 850C, the furnace has a large heat capacity and a stable temperature, which effectively inhibits the formation of dioxin precursors. The practice of disposing of toxic and hazardous wastes in cement kilns at home and abroad shows that the concentration of dioxin emissions produced by waste incineration is far below the emission limit.

The waste gas and dust discharged from calcination are collected by the bag filter at the end of the kiln as cement raw materials and then enter the kiln for calcination. No hazardous waste fly ash is generated.

The refractory bricks, raw materials, kiln skin, and clinker in the sludge waste rotary kiln are all alkaline, which can absorb SO2, thereby inhibiting its emission. In the process of cement firing, the heavy metals in the sludge and slag can be fixed in the structure of the cement clinker. So as to achieve the role of being cured.

Through the treatment of the rotary kiln incinerator, the organic and inorganic components in the sludge can be fully utilized, and the resource utilization efficiency is high. The sludge contains some organic matter (above 55%) and combustible components, which will generate heat when calcined in the rotary kiln. The low calorific value of sludge is about 11MJ/kg, which is equivalent to lean coal in the sense of calorific value. Lean coal contains 55% ash and 10%-15% volatile matter and has a calorific value of 10-12.5MJ/kg.

The sludge rotary kiln incinerator has higher treatment efficiency, the incineration products can be used as cement raw materials, and the heat produced by incineration can be used for power generation, with significant economic benefits. It has become the first choice of incineration equipment for many sewage treatment plants and industrial solid waste treatment enterprises. As a high-quality rotary kiln supplier, AGICO welcomes you to send inquiries for details at any time.

rotary kiln incinerator - design and manufacture

rotary kiln incinerator - design and manufacture

The rotary kiln incinerator is manufactured with a rotating combustion chamber that keeps waste moving, thereby allowing it to vaporize for easier burning. Types of waste treated in a rotary kiln incinerator

The picture"photo 1"gives a schematic overvieuw of the systemmanufactured totreat the waste in a rotating drum, we use a counter current rotary kiln. There are 2 different types of rotary kiln, co-current rotary kilns and counter current rotary kilns. Read here more about the different types of rotary kiln.

Energy recovery is always an individual design, and very attractive is electricity. But electricity is also the most complicated and less economical profitable for small installations ( the min. capacity is 3 ton/h of waste). If heat can be used in another process on site, for example in a dryer. It has to be taken into consideration that a connection between incinerator and the production process (dryer) can be the most efficient solution. The disadvantage can be if there is a production stop of the incinerator, the process (dryer) can not always stop at the same time.

For example : We produce steam as energy recovery, also for electricity production. The post combustion is strictly vertical and the boiler also has a vertical design for evacuation of dust. Our design is made for continuous operation of a steam boiler. The next drawing gives a possible set up of the installation. This is our set-up, created by people with operation experience with incinerators, and it results in this lay-out.

Depending on the amount of Chlorine, S, N or other chemicals in the waste stream there is a wet or/and dry scrubbing system available for the flue gas treatment. Flue gas treatment systems are standard systems, and normal chemical reaction. So, for correct flue gas treatment we need to take care for:

rotary kiln industry related news and posts | rotary kiln blog

rotary kiln industry related news and posts | rotary kiln blog

With the continuous improvement of todays medical standards, the solid waste generated by the medical industry is also increasing. The medical waste produced by the hospital mainly includes infusion tubes,

The main function of the rotary kiln refractory lining is to protect the barrel of the rotary kiln from high-temperature gas and high-temperature materials and to ensure normal production. According

The co-processing of hazardous waste by cement kilns can effectively solve the problem of hazardous waste disposal and achieve the purpose of recyclability. Specifically, in the disposal process, the pre-disposal

rotary kilns

rotary kilns

FEECO is a leading manufacturer of highly engineered, custom rotary kilns for processing solids. Our high temperature kilns have earned a reputation for their durability, efficiency, and longevity. We offer both direct- and indirect-fired units.

Rotary kilns work by processing material in a rotating drum at high temperatures for a specified retention time to cause a physical change or chemical reaction in the material being processed. The kiln is set at a slight slope to assist in moving material through the drum.

Direct-fired kilns utilize direct contact between the material and process gas to efficiently process the material. Combustion can occur in a combustion chamber to avoid direct flame radiation, or the flame can be directed down the length of the kiln.

All FEECO equipment and process systems can be outfitted with the latest in automation controls from Rockwell Automation. The unique combination of proprietary Rockwell Automation controls and software, combined with our extensive experience in process design and enhancements with hundreds of materials provides an unparalleled experience for customers seeking innovative process solutions and equipment.

Indirect-fired kilns are used for various processing applications, such as when processing must occur in an inert environment, when working with finely divided solids, or when the processing environment must be tightly controlled.

Calcination refers to the process of heating a material to a temperature that will cause chemical dissociation (chemical separation). This process is used frequently in the creation of inorganic materials, for example, the dissociation of calcium carbonate to create calcium oxide and carbon dioxide.

Thermal desorption is also a separation process. This process uses heat to drive off a volatile component, such as a pesticide, from an inorganic mineral, such as sand. The component is vaporized at the increased temperature, causing a separation without combustion. In some cases, an indirect rotary kiln would be best for this application, because the volatile chemicals may be combustible. The indirect kiln will supply the heat for desorption, without the material coming into direct contact with the flame.

Organic combustion refers to the treatment of organic wastes with the intent of reducing mass and volume. Organic waste is treated in the kiln, leaving behind an ash with considerably less mass and volume. This allows for more efficient and effective deposit of waste materials into landfills.

Sintering is the process of heating a raw material to the point just before melting. This increases the strength of the material, and is commonly used in the proppant industry, where sand or ceramic materials are made stronger.

Heat setting involves bonding a heat resistant core mineral with another, less heat resistant coating material. Unlike an unheated coating process, here, a rotary kiln heats the coating material to just below liquefaction point, allowing it to coat the heat resistant core more evenly and more securely. This process is commonly seen in the manufacture of roofing granules, where a mineral such as granite is coated with a colored pigment, producing a product that is both durable and aesthetically pleasing.

Reduction roasting is the removal of oxygen from a component of an ore usually by using carbon monoxide (CO). The CO is typically supplied by mixing a carbonaceous material such as coal or coke with the ore or by feeding it separately. Examples are the reduction roasting of a hematite containing material to produce magnetite that can be magnetically separated. In the Waelz process, zinc oxide in steel mill wastes is reduced to metallic zinc and volatilized for recovery in the off-gas system.

Thermal Desorption for Spent CatalystsRotary Kiln3D Indirect Kiln for Activated CarbonPyrolysis Kiln Seal3D FEECO Pyrolysis KilnPyrolysis KilnWorn Rotary Kiln RefractoryKiln Alignment SoftwareBatch Rotary Kiln TestingProcessing Challenges When Working with Rotary KilnsFEECO Batch Kiln BrochureIndustry Focus COVID-19 Demands Medical Waste Incineration CapacityIndirect Fired Rotary Kiln ReplacementRotary Kiln IncineratorsResource of the Week: Thermal Testing with Kilns3D Model of a FEECO Carbon Activation KilnRotary Kiln Testing ThumbnailRotary Kiln TestingIndirect Batch Rotary Kiln Testing, Batch Calciner Testing, Thermal Process DevelopmentKnowing When its Time to Replace Your Rotary Drum Seal, Leaf SealRotary Drum Drive ComponentsRotary Drum BreechingReplacement Rotary Drum BearingsBoomin Catalyst Market Drives Demand for Rotary Kiln Repair Services, Rotary KilnsReplacement Dryer (Drier) and Kiln BurnersCombustion ChambersReplacement Rotary Drum ShellRotary Drum Laser Alignment Process, Rotary Drum AlignmentWhy Post Maintenance Alignment is Critical to Rotary DrumsCauses of Tire (Tyre) and Trunnion Wear, Rotary Drum TireFEECO Tire (Tyre) Grinding Machine, Tire and Trunnion Grinding in ProgressRotary Drum Tire (Tyre) Wear Pattern from Excessive Wheel Skewing, Rotary Drum Tire in Need of Tire GrindingRotary Drum Tire (Tyre) Wear Pattern from Poor Housekeeping Practices, Rotary Drum Tire in Need of Tire GrindingRotary Drum Tire (Tyre) Wear Pattern from Misalignment, Rotary Drum Tire in Need of Tire GrindingRotary Drum Tire (Tyre) Wear Pattern from Using Improper Tire Lubricant, Rotary Drum Tire in Need of Tire GrindingTire (Tyre) and Trunnion Wheel GrindingTire (Tyre) and Trunnion GrindingIndirect Rotary Kiln (Calciner) for Plastics PyrolysisPlastic to Fuel Conversion via Pyrolysis Replacement Rotary Drum PartsRotary Drum Thrust RollersRotary Drum Trunnion Wheels (Rollers)Rotary Drum Riding Ring (Tire/Tyre)Resource of the Week: Girth Gears PageRotary Kiln System Optimization, Rotary Kiln Process AuditSpring-Mounted Replacement Rotary Drum Girth GearRotary Kiln Gains Traction as E-Waste Crisis Looms, Metal Recovery from E-WasteIndirect Batch Rotary Kiln Testing, Batch Calciner Testing, Thermal Process Development, Metal RecoveryDirect-Fired Rotary KilnRotary Kiln Chain and Sprocket Drive AssemblyRotary Kiln Gear and Pinion Drive AssemblyRotary Kiln Friction Drive AssemblyRotary Kiln Direct Drive AssemblyRotary Kiln Trunnion BaseRotary kiln end dam for increasing loading, retention time, and bed depthResource of the Week: Rotary Kiln Customization Slideshare PresentationKaolin Clay CalcinationLithium-ion Battery Recycling OpportunitiesRotary Kilns in Expanded Clay Aggregate ProductionBatch Kiln for Testing Expanded Clay AggregatesRotary Kiln Refractory Failure Illustration, Rotary Kiln Shell Hot SpotRotary Kiln Refractory InspectionDirect-Fired Rotary Kiln for SpodumeneCalciner (Indirect Kiln) for Lithium Recovery from SpodumeneRotary Kiln Complete SystemFEECO Batch Kiln for Testing CalcinationRotary Drum Drive BaseRotary Kilns for Advanced Thermal Processing in SustainabilityResource of the Week: Project Profile on a Rotary Kiln (Calciner) Resource Recovery SystemResource of the Week: Tire Grinding BrochureResource of the Week: Slideshare Presentation on Rotary Kiln Sizing and DesignResource of the Week: Unitized Drive Base BrochureDiagram Showing a Rotary Kiln with Co-current AirflowDiagram Showing a Rotary Kiln with Counter Current AirflowDiagram Showing Co-current Airflow View All >

The advantages to a FEECO rotary kiln are that it is built to the highest quality standards and is backed by over 60 years of process design experience. The FEECO Innovation Center offers batch and pilot scale kilns that can simulate conditions in continuous commercial rotary kilns, allowing our customers to test small samples of material under various process conditions, as well as part of a continuous process. With options in both co-current and counter-current flow, and direct or indirect configurations, the FEECO test kilns offer a variety of options to suit your thermal testing needs. We also offer support equipment such as a combustion chamber, afterburner, baghouse, and wet scrubber for testing.

sewage sludge gasification in a bench scale rotary kiln - sciencedirect

sewage sludge gasification in a bench scale rotary kiln - sciencedirect

Sewage sludge was gasified in a bench scale rotary kiln.Temperature and the equivalence ratio were varied.Each Test run for about 2 h at steady state.Input and output streams were quantified and qualified.Drawbacks of the process were sewage sludge feeding and rotary kiln sealing.

The goal of this work is to investigate the potentiality of energetic recovery by sewage sludge gasification. Experimental gasification tests were carried out in a bench scale rotary kiln under simulated autothermal condition. The mass rate of sludge was in the range 170260g/h. The gasification temperature was varied from 750 to 850C, equivalence ratio was increased up to 0.24. The tests run for about 3h. Input and output streams of the process were quantified and analyzed as to assess the cold gas efficiency. Tar content in the raw gas was determined as well. The main drawbacks occurred during the tests were highlighted to have a realistic frame of the experimented technology.

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