氣力輸送系統(tǒng)概述與維護(hù)的重要性

　　Overview of pneumatic conveying system and the importance of maintenance

　　1.1 氣力輸送基本原理

　　1.1 Basic principles of pneumatic conveying

　　氣力輸送是利用空氣（或其他氣體）作為動(dòng)力介質(zhì)，在密閉管道內(nèi)沿氣流方向輸送粉狀、粒狀等散裝物料的技術(shù)。根據(jù)物料在管道內(nèi)的濃度和輸送速度，主要分為兩大類：稀相輸送 (Dilute Phase Conveying):?特點(diǎn)是物料在管道內(nèi)呈懸浮狀態(tài)，以較高的速度（通常 > 18 m/s）和較低的固氣比（物料與氣體質(zhì)量比，通常 < 15）進(jìn)行輸送。系統(tǒng)壓力或真空度相對(duì)較低。稀相輸送適用于大多數(shù)非磨蝕性、不易破碎的粉粒體物料，具有輸送量大、距離遠(yuǎn)的特點(diǎn)。濃相輸送 (Dense Phase Conveying):?特點(diǎn)是物料在管道內(nèi)呈栓狀、團(tuán)狀或流化床狀態(tài)，以較低的速度（通常 < 10 m/s）和極高的固氣比（通常 > 30）進(jìn)行輸送。系統(tǒng)需要較高的氣體壓力。濃相輸送能耗較低，管道磨損小，物料破碎率低，特別適用于磨蝕性強(qiáng)、易破碎、高密度或混合物料的輸送。

　　Pneumatic conveying is a technology that uses air (or other gases) as a power medium to transport bulk materials such as powders and granules along the direction of airflow in a closed pipeline. According to the concentration and conveying speed of materials in the pipeline, they are mainly divided into two categories: dilute phase conveying:? The characteristic is that the material is suspended in the pipeline and transported at a high speed (usually>18 m/s) and a low solid to gas ratio (material to gas mass ratio, usually<15). The system pressure or vacuum degree is relatively low. Dilute phase conveying is suitable for most non abrasive and difficult to break powder materials, with the characteristics of large conveying capacity and long distance. Dense Phase Conveying:? The characteristic is that the material is in the form of plugs, clumps, or fluidized beds in the pipeline, transported at low speeds (usually<10 m/s) and extremely high solid to gas ratios (usually>30). The system requires a high gas pressure. Dense phase conveying has low energy consumption, minimal pipeline wear, and low material crushing rate, making it particularly suitable for conveying highly abrasive, easily broken, high-density, or mixed materials.

　　1.2 系統(tǒng)維護(hù)的必要性與價(jià)值

　　1.2 The necessity and value of system maintenance

　　一套設(shè)計(jì)精良的氣力輸送系統(tǒng)也需要依賴于嚴(yán)格的維護(hù)計(jì)劃才能發(fā)揮其最大效能。忽視維護(hù)將直接導(dǎo)致以下問(wèn)題：生產(chǎn)中斷：?設(shè)備突發(fā)故障，如管道堵塞、供料器卡死等，將直接導(dǎo)致生產(chǎn)線停工，造成巨大的經(jīng)濟(jì)損失。運(yùn)營(yíng)成本增加：?管道和設(shè)備的磨損加劇、空氣泄漏導(dǎo)致能源消耗增加、備件頻繁更換等，都將推高運(yùn)營(yíng)成本。物料損耗與質(zhì)量下降：?系統(tǒng)密封不嚴(yán)會(huì)導(dǎo)致物料泄漏；不穩(wěn)定的輸送過(guò)程可能導(dǎo)致易碎物料的破碎率增高，影響產(chǎn)品質(zhì)量。安全與環(huán)境風(fēng)險(xiǎn)：?粉塵泄漏不僅污染工作環(huán)境，對(duì)于可燃性粉塵，還可能引發(fā)粉塵爆炸等嚴(yán)重安全事故。設(shè)備故障也可能對(duì)操作人員構(gòu)成安全威脅。因此，建立并執(zhí)行一套系統(tǒng)化、標(biāo)準(zhǔn)化的保養(yǎng)與維護(hù)規(guī)程，是保障氣力輸送系統(tǒng)高效、經(jīng)濟(jì)、安全、可靠運(yùn)行的核心。

　　A well-designed pneumatic conveying system also relies on a strict maintenance plan to maximize its efficiency. Neglecting maintenance will directly lead to the following problems: production interruption:? Sudden equipment malfunctions, such as pipeline blockages, stuck feeders, etc., will directly cause the production line to shut down, resulting in huge economic losses. Increased operating costs:? The increased wear and tear of pipelines and equipment, air leaks leading to increased energy consumption, and frequent replacement of spare parts will all drive up operating costs. Material loss and quality decline:? Poor sealing of the system can lead to material leakage; Unstable conveying processes may increase the breakage rate of fragile materials, affecting product quality. Safety and environmental risks:? Dust leakage not only pollutes the working environment, but also may cause serious safety accidents such as dust explosions for combustible dust. Equipment failures may also pose a safety threat to operators. Therefore, establishing and implementing a systematic and standardized maintenance and upkeep procedure is the core to ensure the efficient, economical, safe, and reliable operation of pneumatic conveying systems.

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