粉体输送中正压稀相气力输送系统构成

　　正压稀相气力输送系统简介

　　正压稀相气力输送系统主要是以罗茨风机产生的气流作为载体将颗粒、粉状、小块状物料输送至指定卸料点的气力输送系统，输送管道布置灵活、密闭性好、粉尘飞扬溢出少、节能环保效率高、操作简单易维护、可实现散装物料输送、自动化程度高、有效降低人员输送费用、包装和装卸费用，此外，正压气力输送系统输送过程中，还可同时对物料进行多种物料或化学工艺处理，如物料的混合、粉碎、分级、干燥、冷却等工艺处理。

　　系统参数:本系统主要以罗茨鼓风机为动力源，空气速度: 15m/s-30m/s，物料速度:8m/s-15m/s,输送能力:1-100t/h，输送距离150米内(采用多级动力源距离可达1000m)。

系统构成

　　正压稀相气力输送系统的配置一般使用罗茨鼓风机作为气源,罗茨鼓风机在系统的*前端，靠风机的出口风力将物料吹送至远处的受料仓中。

　　正压稀相气力输送系统主要由罗茨风机、输送系统(旋转供料器、连续式输送泵、管道、切换阀门、阀门仪表等)、储灰系统(灰库、库顶除尘器、干灰散装机、加湿搅拌机、阀门仪表等)等设备构成，主要以罗茨风机为动力，将灰斗储灰用管道送入灰库储存，然后经罐车或汽车外运，因其气源压力较低，管道内灰尘浓度较低，具有输送量大，能耗低，设备磨损硝，维护费用低的优势。

　　正压稀相气力输送系统特点

　　①正压稀相气力输送系统设备自动化程度高，出气投资少，操作简单易维护，节能环保效率高;

　　②利用气体动压，物料以较高速度在管道中前进( 8m/s-25m/s)，输送压力沿输送管道逐渐降低;

　　③连续输送，输送流态、输送速度与输送压力、料气比基本保持稳定，运行可靠性高，容易维护;

　　④应用于闭环系统时，不必增加气力缓冲设备，容易控制;⑤输送距离短，尤其适合于短距离或中等距离的气力输送;

　　⑥系统输送为连续式输送，亦可间断，管道内无物料积存，输送对环境污染小。

　　局限性和不足

　　1.与一些机械输送形式相比，气力输送系统能耗高，例如要求远距离的大容量输送时。

　　⒉.输送距离有限。可以长距离超过1000米，但实际输送距离一般为5-500米。

　　3.输送量有限。虽然气力输送的**量可达400吨/小时,但大多系统输送量为1-60吨/小时。4.研磨类产品会让管道和设备受到磨损。

　　5.高速输送时会使易碎产品破损。

负压稀相气力输送系统工作原理和系统优势

　　负压气力输送系统主要由:气力输送风机(罗茨泵、罗茨真空泵、负压罗茨风机)、取料装置、管道、缓冲仓、除尘器、卸料装置、等构成。

　　负压稀相气力输送系统主要采用负压罗茨真空泵作为动力源,管道输送压力为低真空状态，管道风速约10-35米/秒,物料在管道内呈雾状。负压输送起点压力等于或接近大气压，终点压力在-10到-50Kpa之间，管道真空度沿气力输送管道逐渐增高。

　　负压稀相气力输送系统工作原理

　　1、系统主要采用罗茨风机或真空泵作为气源设备，气源设备在系统的末端;2、气力输送系统取料装置部件通常采用特殊结构的吸嘴;

　　3、风机运转后，抽风整个系统形成负压，由管道内外存在的压力差将物料吸入输料管，物料和一部分空气同时被吸嘴吸入，并被送到缓冲仓内;

　　4、在缓冲仓内，物料和空气分离，被分离出的物料从缓冲仓的底部通过锁气阀卸出;5、未被分离出来的微细粉粒输送气流进入除尘器中净化，净化后的空气净除尘器，风机排入大气中。

　　负压稀相气力输送系统系统优势

　　1、本负压系统具有气力输送量大、输送距离长、输送速度快等特点;

　　2、系统易于取料，适用于从低压、深处、较为狭窄的取料点取料，可用于要求取料不发尘的场合，可实现多处上料向一处集中供料。负压稀相气力输送系统适用性广，用于广泛，粉体、颗粒物均可顺利输送;

　　3、系统气源位于末端，润滑油或水分等不会混入输送的物料中，输送物料更清洁;

　　4、系统由于输料管道内为负压，因此系统管道产生磨损或存在间隙时，被输送物料也不会发生泄漏，此外，由于负压稀相气力输送系统内压力低于大气压，水分更易蒸发，所以对水分多的物料较其他方法更容易输送;

　　5、系统输送气体一般直接取自大气，气体的温度即为环境温度，因此负压气力输送系统适用于对温度敏感的热敏性物料

　　负压稀相气力输送系统散料输送效率高，由于物料在完全密闭的管道内输送，可避免输送物料受潮、污损和混入其他杂物等现象，物料输送质量高，可由多点的物料送往一处或由一处送往多处,并实现较远距离输送,此外,系统在物料输送过程中还可同时实现物料混合、粉碎、分级、干燥、冷却、除尘等多种工艺操作。

　　上海瑞柘环保设备集团有限公司生产销售的罗茨风机、罗茨真空泵在正压负压稀相气力输送系统中应用广泛!同时，公司的客户中不乏正压负压稀相气力输送系统与中央供料系统的生产厂家!若您公司正在购买相关产品，可以联系我们哦!

　　Composition of positive pressure dilute phase pneumatic conveying system in powder conveying

　　Brief introduction of positive pressure dilute phase pneumatic conveying system

　　The positive pressure dilute phase pneumatic conveying system mainly uses the air flow generated by roots blower as the carrier to transport granular, powdery and small pieces of materials to the designated unloading point. The conveying pipeline has flexible layout, good tightness, less dust flying and overflow, high energy-saving and environmental protection efficiency, simple operation and easy maintenance, can realize bulk material transportation, high degree of automation, and effectively reduce personnel transportation costs, packaging and loading and unloading costs. In addition, In the conveying process of the positive pressure pneumatic conveying system, it can also carry out a variety of material or chemical processes for materials at the same time, such as material mixing, crushing, grading, drying, cooling and other processes.

　　System parameters: the system mainly uses roots blower as the power source, air speed: 15m / s-30m / s, material speed: 8m / s-15m / s, conveying capacity: 1-100t / h, and the conveying distance is within 150m (multi-stage power source is adopted, and the distance can be up to 1000m).

　　System composition

　　The configuration of the positive pressure dilute phase pneumatic conveying system generally uses the roots blower as the air source. The roots blower is at the front end of the system and blows the materials to the distant receiving bin by the outlet wind force of the fan.

　　The positive pressure dilute phase pneumatic conveying system is mainly composed of Roots blower, conveying system (rotary feeder, continuous conveying pump, pipeline, switching valve, valve instrument, etc.), ash storage system (ash silo, dust collector on the top of the silo, dry ash bulk machine, humidifying mixer, valve instrument, etc.) and other equipment. It is mainly powered by roots blower, and the ash stored in the ash hopper is sent to the ash silo through pipeline for storage, and then transported outside by tank truck or truck. Due to its low air source pressure, The dust concentration in the pipeline is low, which has the advantages of large transportation capacity, low energy consumption, equipment wear and low maintenance cost.

　　Characteristics of positive pressure dilute phase pneumatic conveying system

　　① The positive pressure dilute phase pneumatic conveying system has the advantages of high automation, less gas outlet investment, simple operation, easy maintenance, high energy conservation and environmental protection efficiency;

　　② Using the gas dynamic pressure, the material advances in the pipeline at a high speed (8m / s-25m / s), and the conveying pressure decreases gradually along the conveying pipeline;

　　③ Continuous conveying, conveying flow pattern, conveying speed, conveying pressure and material gas ratio remain basically stable, with high operation reliability and easy maintenance;

　　④ When applied to the closed-loop system, there is no need to add pneumatic buffer equipment, which is easy to control; ⑤ Short conveying distance, especially suitable for short or medium distance pneumatic conveying;

　　⑥ The system transportation is continuous or intermittent. There is no material accumulation in the pipeline, and the transportation has little environmental pollution.

　　Limitations and deficiencies

　　1. Compared with some mechanical conveying forms, pneumatic conveying system has high energy consumption, such as long-distance high-capacity conveying.

　　⒉. The conveying distance is limited. The long distance can exceed 1000 meters, but the actual conveying distance is generally 5-500 meters.

　　3. Limited transportation capacity. Although the maximum capacity of pneumatic conveying can reach 400 tons / hour, the conveying capacity of most systems is 1-60 tons / hour. 4. Abrasive products will wear pipes and equipment.

　　5. Fragile products will be damaged during high-speed transportation.

　　Working principle and system advantages of negative pressure dilute phase pneumatic conveying system

　　The negative pressure pneumatic conveying system is mainly composed of: pneumatic conveying fan (roots pump, roots vacuum pump, negative pressure Roots fan), reclaiming device, pipeline, buffer bin, dust collector, unloading device, etc.

　　The negative pressure dilute phase pneumatic conveying system mainly uses the negative pressure roots vacuum pump as the power source. The pipeline conveying pressure is in a low vacuum state, the pipeline wind speed is about 10-35 M / s, and the materials are in the form of fog in the pipeline. The starting pressure of negative pressure transmission is equal to or close to atmospheric pressure, the end pressure is between - 10 and - 50kPa, and the pipeline vacuum increases gradually along the pneumatic transmission pipeline.

　　Working principle of negative pressure dilute phase pneumatic conveying system

　　1. The system mainly uses roots blower or vacuum pump as the air source equipment, and the air source equipment is at the end of the system; 2. The components of reclaiming device in pneumatic conveying system usually adopt suction nozzle with special structure;

　　3. After the fan operates, the whole system will be pumped to form negative pressure. The material will be sucked into the material conveying pipe by the pressure difference inside and outside the pipe. The material and part of the air will be sucked into the suction nozzle at the same time and sent to the buffer bin;

　　4. In the buffer bin, materials and air are separated, and the separated materials are discharged from the bottom of the buffer bin through the air lock valve; 5. The fine powder particles that have not been separated are transported into the dust remover for purification, and the purified air is discharged into the atmosphere through the dust remover and fan.

　　Advantages of negative pressure dilute phase pneumatic conveying system

　　1. The negative pressure system has the characteristics of large pneumatic conveying capacity, long conveying distance and fast conveying speed;

　　2. The system is easy to reclaim. It is suitable for reclaiming from low-pressure, deep and narrow reclaiming points. It can be used where reclaiming is not required to produce dust, and can realize centralized feeding from multiple feeding points to one place. The negative pressure dilute phase pneumatic conveying system has wide applicability and is widely used. Powder and particles can be transported smoothly;

　　3. The air source of the system is located at the end, and the lubricating oil or water will not be mixed into the transported materials, so the transported materials are cleaner;

　　4. Because there is negative pressure in the conveying pipeline of the system, the conveyed materials will not leak when the system pipeline is worn or there is a gap. In addition, because the pressure in the negative pressure dilute phase pneumatic conveying system is lower than the atmospheric pressure, the water is easier to evaporate, so the materials with more water are easier to transport than other methods;

　　5. The gas conveyed by the system is generally directly taken from the atmosphere, and the temperature of the gas is the ambient temperature. Therefore, the negative pressure pneumatic conveying system is suitable for heat sensitive materials sensitive to temperature

　　The bulk material conveying efficiency of the negative pressure dilute phase pneumatic conveying system is high. Because the materials are transported in a completely closed pipeline, the phenomena of moisture, dirt and mixing with other sundries can be avoided. The material conveying quality is high. The materials can be sent from multiple points to one place or from one place to multiple places, and the long-distance conveying can be realized. In addition, the system can also realize the mixing, crushing, grading, drying, cooling, and Dust removal and other process operations.

　　Roots blower and roots vacuum pump produced and sold by Shanghai Ruizhe Environmental Protection Equipment Group Co., Ltd. are widely used in positive pressure and negative pressure dilute phase pneumatic conveying system! At the same time, there are many manufacturers of positive pressure and negative pressure dilute phase pneumatic conveying system and central feeding system among the company's customers! If your company is purchasing related products, you can contact us!