粉體輸送中正壓稀相氣力輸送系統構成

　　正壓稀相氣力輸送系統簡介

　　正壓稀相氣力輸送系統主要是以羅茨風機產生的氣流作為載體將顆粒、粉狀、小塊狀物料輸送至指定卸料點的氣力輸送系統，輸送管道布置靈活、密閉性好、粉塵飛揚溢出少、節能環保效率高、操作簡單易維護、可實現散裝物料輸送、自動化程度高、有效降低人員輸送費用、包裝和裝卸費用，此外，正壓氣力輸送系統輸送過程中，還可同時對物料進行多種物料或化學工藝處理，如物料的混合、粉碎、分級、干燥、冷卻等工藝處理。

　　系統參數:本系統主要以羅茨鼓風機為動力源，空氣速度: 15m/s-30m/s，物料速度:8m/s-15m/s,輸送能力:1-100t/h，輸送距離150米內(采用多級動力源距離可達1000m)。

系統構成

　　正壓稀相氣力輸送系統的配置一般使用羅茨鼓風機作為氣源,羅茨鼓風機在系統的*前端，靠風機的出口風力將物料吹送至遠處的受料倉中。

　　正壓稀相氣力輸送系統主要由羅茨風機、輸送系統(旋轉供料器、連續式輸送泵、管道、切換閥門、閥門儀表等)、儲灰系統(灰庫、庫頂除塵器、干灰散裝機、加濕攪拌機、閥門儀表等)等設備構成，主要以羅茨風機為動力，將灰斗儲灰用管道送入灰庫儲存，然后經罐車或汽車外運，因其氣源壓力較低，管道內灰塵濃度較低，具有輸送量大，能耗低，設備磨損硝，維護費用低的優勢。

　　正壓稀相氣力輸送系統特點

　　①正壓稀相氣力輸送系統設備自動化程度高，出氣投資少，操作簡單易維護，節能環保效率高;

　　②利用氣體動壓，物料以較高速度在管道中前進( 8m/s-25m/s)，輸送壓力沿輸送管道逐漸降低;

　　③連續輸送，輸送流態、輸送速度與輸送壓力、料氣比基本保持穩定，運行可靠性高，容易維護;

　　④應用于閉環系統時，不必增加氣力緩沖設備，容易控制;⑤輸送距離短，尤其適合于短距離或中等距離的氣力輸送;

　　⑥系統輸送為連續式輸送，亦可間斷，管道內無物料積存，輸送對環境污染小。

　　局限性和不足

　　1.與一些機械輸送形式相比，氣力輸送系統能耗高，例如要求遠距離的大容量輸送時。

　　⒉.輸送距離有限。可以長距離超過1000米，但實際輸送距離一般為5-500米。

　　3.輸送量有限。雖然氣力輸送的**量可達400噸/小時,但大多系統輸送量為1-60噸/小時。4.研磨類產品會讓管道和設備受到磨損。

　　5.高速輸送時會使易碎產品破損。

負壓稀相氣力輸送系統工作原理和系統優勢

　　負壓氣力輸送系統主要由:氣力輸送風機(羅茨泵、羅茨真空泵、負壓羅茨風機)、取料裝置、管道、緩沖倉、除塵器、卸料裝置、等構成。

　　負壓稀相氣力輸送系統主要采用負壓羅茨真空泵作為動力源,管道輸送壓力為低真空狀態，管道風速約10-35米/秒,物料在管道內呈霧狀。負壓輸送起點壓力等于或接近大氣壓，終點壓力在-10到-50Kpa之間，管道真空度沿氣力輸送管道逐漸增高。

　　負壓稀相氣力輸送系統工作原理

　　1、系統主要采用羅茨風機或真空泵作為氣源設備，氣源設備在系統的末端;2、氣力輸送系統取料裝置部件通常采用特殊結構的吸嘴;

　　3、風機運轉后，抽風整個系統形成負壓，由管道內外存在的壓力差將物料吸入輸料管，物料和一部分空氣同時被吸嘴吸入，并被送到緩沖倉內;

　　4、在緩沖倉內，物料和空氣分離，被分離出的物料從緩沖倉的底部通過鎖氣閥卸出;5、未被分離出來的微細粉粒輸送氣流進入除塵器中凈化，凈化后的空氣凈除塵器，風機排入大氣中。

　　負壓稀相氣力輸送系統系統優勢

　　1、本負壓系統具有氣力輸送量大、輸送距離長、輸送速度快等特點;

　　2、系統易于取料，適用于從低壓、深處、較為狹窄的取料點取料，可用于要求取料不發塵的場合，可實現多處上料向一處集中供料。負壓稀相氣力輸送系統適用性廣，用于廣泛，粉體、顆粒物均可順利輸送;

　　3、系統氣源位于末端，潤滑油或水分等不會混入輸送的物料中，輸送物料更清潔;

　　4、系統由于輸料管道內為負壓，因此系統管道產生磨損或存在間隙時，被輸送物料也不會發生泄漏，此外，由于負壓稀相氣力輸送系統內壓力低于大氣壓，水分更易蒸發，所以對水分多的物料較其他方法更容易輸送;

　　5、系統輸送氣體一般直接取自大氣，氣體的溫度即為環境溫度，因此負壓氣力輸送系統適用于對溫度敏感的熱敏性物料

　　負壓稀相氣力輸送系統散料輸送效率高，由于物料在完全密閉的管道內輸送，可避免輸送物料受潮、污損和混入其他雜物等現象，物料輸送質量高，可由多點的物料送往一處或由一處送往多處,并實現較遠距離輸送,此外,系統在物料輸送過程中還可同時實現物料混合、粉碎、分級、干燥、冷卻、除塵等多種工藝操作。

　　上海瑞柘環保設備集團有限公司生產銷售的羅茨風機、羅茨真空泵在正壓負壓稀相氣力輸送系統中應用廣泛!同時，公司的客戶中不乏正壓負壓稀相氣力輸送系統與中央供料系統的生產廠家!若您公司正在購買相關產品，可以聯系我們哦!

　　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!