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Conveyor PartsPneumatic Conveying SystemMetal Aluminum Powder
Shandong Longcheng Pneumatic Conveying Engineering Equipment Co., Ltd
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Product Description Characteristics of pneumatic conveyingSimple equipment, compact structure, small footprint, flexible configuration of the conveying pipeline, so that the factory production process is more reasonable.conveying system is completely closed, less dust flying, can realize the environmental requirementsless moving parts, easy maintenance, easy to achieve centralized control of the entire system and program automationhigh efficiency of bulk material conveying, reduce the cost of packaging and handling and transportation(5) It can avoid moisture, dirt and other sundry materials being conveyed, and ensure the quality of conveyance.(6) A variety of processes can be realized simultaneously in the conveying process, such as mixing, crushing, grading, drying, cooling, dust removal and other preparatory processes, but also certain chemical reactions(7) can be concentrated by the number of points of the material transported to a place or from a place to the number of points scattered, and to achieve long-distance operation(8) for chemically unstable materials, you can use inert gas transportation2. Classification of pneumatic conveyingThere are various ways to categorize pneumatic conveying, and among these, two are commonly used:1. According to the dense degree of materials in the pipeline, it can be divided into: thin-phase conveying, medium-phase conveying and dense-phase conveying.Dilute-phase conveying: conveying pressure is relatively low and stable, with the increase of air speed and rise, the material-gas ratio is generally low.Dense-phase conveying: higher conveying pressure, low gas velocity, can realize high material-gas ratio conveying.2. According to the airflow formed in the pipeline, it can be divided into three major categories: suction-feeding, pressure-feeding and composite. No matter how many forms of pneumatic conveying devices today, can be categorized into suction-feeding, pressure-feeding type of these two categoriesPneumatic conveying classificationClassification basisTypeMixing ratio of material and gasDilute phase <10, Medium phase 10~25, Dense phase >25Flow modeSuction (negative pressure), pressure (positive pressure)Gas source pressure (MPa)High vacuum -0.05~-0.02; Low vacuum -0.02~0.02 Classification basisTypeGas source pressure (MPa)Low pressure 0~0.05,; High pressure 0.1~0.7Conveyor PrincipleDynamic pressure (velocity energy), static pressure (pressure energy)flow stateSuspension flow, group flow, bolus flowSuction pneumatic conveyingThe air source equipment is installed at the end of the equipment system. When the fan is running, the whole system forms a negative pressure, at this time, there is a pressure difference in the pipeline, and the air is sucked into the feeding pipe. At the same time, the material is also brought into the pipeline by the air and is transported to the separator. In the separator, the material is separated from the air, the separated material is discharged by the rotary discharge valve at the bottom of the separator, and the air is sent to the dust collector for purification, and the purified air is discharged into the atmosphere through the fan. Pressure-fed pneumatic conveyingThe air supply unit is located in front of the feed end of the system. Since the fan is located at the front of the system, the material is not free to enter the feed pipe and a sealed pressure feeder unit must be used. When the fan is turned on, the pressure in the pipe is higher than atmospheric pressure. At this point, the material from the hopper enters the pipe via the rotary feed and is then transported by compressed air to the separator. In the separator, the material is separated from the air and discharged by a rotary discharge valve.Composite pneumatic conveyingIt consists of a composite of suction-feeding and pressure-feeding. This system has the characteristics of both, can be from several places to inhale the material, and the material is pressed to a farther placeFlow state of pneumatic conveyingA: Suspension flow conveyingThe material conveying speed is higher than the suspension speed, and the material flows in suspension in the pipeline. Concentration ratio is small, this transportation method is suitable for low-pressure dilute-phase short-distance transportation.B.Group Flow ConveyingThe material conveying speed is about equal to the suspension speed, and the material moves into a group state in the pipeline. Concentration ratio is moderate, this transportation method is suitable for medium pressure and long distance transportation.C:Bolt flow conveyingThe material conveying speed is lower than the suspension speed, the material in the pipeline by the pulse valve (air knife) air pressure cut into bolts, relying on the material before and after the bolts of static air pressure difference as the driving force forward. Concentration ratio is high, this conveying method is suitable for medium-pressure and long-distance conveying.1.Typical application fieldsPetrochemical polymers, granules, powder materials, such as transportation, mixing, batching, packaging and other processesplastics processing enterprises, raw material storage, feeding, weighing, mixing, proportioning and other processesMetallurgy, electric power enterprises, coal ash, desulfurization ash, dust ash, such as conveyingchemical, biochemical, fine chemical products, such as transportation, mixing, packagingfood, pharmaceutical production of raw materials transportation, mixing, dosing, crushing, drying and other processesGrain storage, transfer processTherefore, the design of each pneumatic conveying system needs to analyze the material characteristics, and according to the actual needs of customers and process characteristics to provide suitable overall solutions. The following analysis of the material characteristics of some of the summary, is often considered in the design of pneumatic conveying systemHazardous Materials 2.Materials of dissimilar composition Free-flowing materials 4.Abrasive Materials 5.Wet / Viscous Materials1. Brittle materials 2. Non-free-flowing materials 3. Easy material material 4.Fluidized/liquefied materials 5.Large particle size materialsOf course, it is also necessary to understand some of the basic material and chemical properties of the material, as well as the basic requirements for transportation and operation: Specific gravity of heap [kg/m3]Material strength distribution [um-mmMaterial temperature [oC]Wet content [WT%]Static electricity accumulation, flammable and explosive explosions, etc.Conveying capacity, horizontal distance, vertical elevation, number of elbows, etc.Continuous, intermittent operationDense phase/dilute phase pneumatic conveying systemsDense-phase high-pressure pneumatic conveying: the system has a low flow rate, low gas consumption, suitable for long-distance, large-capacity, multi-dispersed conveying, for the permeability of the material, it is easy to realize the fluidization of conveying, with low noise, less broken. Detailed parametersSystem Parameterstransport volumetransport pressurePipe DiameterConveying heightConveying distance0.1~100100~60040~200501000Device CorrespondenceA1A2A3 Ton Bag Unpacking Machinesilo pumptap valve Dilute-phase medium- and low-pressure vacuum suction pneumatic conveying: this system has the characteristics of centralized transportation of materials from a number of out to one place; low conveying pressure, reliable conveying, simple equipment; due to the pressure in the system is lower than the atmospheric pressure, the materials to be conveyed will not escape from the system; due to the suction nozzle suction, can avoid the dust flying at the pick-up point, and the characteristics of less crushing. Detailed parametersSystem Parameters transport volumetransport pressurePipe DiameterConveying heightConveying distance0.1~150-29.4~-8050~3005~3010~150Device CorrespondenceB1B2B3B4 Manual feeding stations Dust Collector Curved plate feeders Roots Blower Mobile Pneumatic Conveying System Working PrincipleThe inlet of the fan produces a certain negative pressure gas, the material is sucked in from the suction nozzle and transported to the separator, and the material enters the unloader under the effect of gravity, and the material is supplied uniformly under the drive of the motor. The outlet of the fan generates high-pressure gas with a certain pressure, carrying the material to the specified position.Typical application examples of pneumatic conveyingPositive pressure conveying fly ash system diagramscrew air compressor 2.freeze dryer 3.air storage tank 4.electric contact pressure gauge 5.manual cartridge valve 6.electric discharge valve 7.top-led warehouse pump 8.discharge valve 9.low material level 10.high material level 11.vacuum release valve 12.continuous material level meter 13.bag filter 14.roots blower 15.electric heater 16.PLC control boxNegative pressure ash removal system diagram1. electric air locker 2. gasification plate 3. discharge valve 3. electric heater 5. ash hopper gasification fan 6. cyclone separator 7. heavy hammer type air collector 8. combined bag dust collector 9. electric air locker 10. Roots vacuum pump 11. screw air compressor 12. freeze dryer 13. storage tank 14. raw ash storage gasification fan 15. rotary unloader 16. dry ash bulk loader 17. electric heater 18 .Wet mixer 19.Fly ash tanker 20.High pressure centrifugal fan 21.Pulse bag filter 22.Rotary feeder 23.Multi-tube collector 24.Electric air locker 25.Sorting machine 26.Roots blower 27.Pneumatic discharge valve 28.Bag filter 29.Induced draft fan FAQ1, what is the application of pneumatic conveying system and material The pneumatic conveying system conveying petrochemical polymer, particles, powder conveying;The plastic processing enterprises of raw material storage, loading ,weighing,mixing, ratio of metallurgy;The electric power enterprise fly ash ,desulfurization ash ,dust pneumatic conveying;The food,pharmaceutical production materials ,mixed ingredients , crushing ,drying etc;The pneumatic conveying of grain storage transfer process ;2,What are the basic physical and chemical characteristics of the pneumatic conveying system, as well as the basic requirements of transportation and operation? bulk specific gravity (kg/m3) ,material strength distribution(um-mm) ,material temperature (oC),moisture content (WT%),conveying capacity, horizontal distance, vertical height,the elbow quantity etc;if continuous and intermittent operation,requirements for upstream and downstream equipment and boundaries;3, What equipments are included in the pneumatic conveying system?The leading products of pneumatic conveying system are rotary feeder (rotary valve, star feeder, lock air rotary valve), wear-resisting feeder, stainless steel rotary feeder, shunt valve, roots blower(positive displacement blower), roots vacuum pump, cone pump, bag dust collector, automatic dismantling charter, electrical control cabinet, etc., and power plant ash desulfurization denitration system, petrochemical industry powder material pneumatic conveying system, weighing metering batching system.
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