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除粉器选型入口：XD-20~XD-90 型号表、外形尺寸与选型要点
2026 年 4 月，一家 TPU 改性企业把 25 kg 来料送到试验现场。来料是万华化学的热塑性聚氨酯弹性体（TPU）破碎片，不规则片状，粉尘和细碎颗粒明显偏多。用 RC1 试验机（处理能力 150–350 kg/h）跑完之后，除粉后的样品基本看不到细小粉尘和细小颗粒；收集下来的粉尘，大约占样品体积的 10%。
这个案例很能说明问题：很多工厂以为“除粉”就是把输送气体里的灰尘过滤掉，但真正影响产品洁净度的，是粘在颗粒表面的微粉、碎屑和拉丝。除粉器（DeDuster）处理的正是后者——它是一台物料净化设备，不是除尘器。
上海科全工程技术有限公司供应的除粉器对应 DeDuster 系列，型号覆盖 XD-20 至 XD-90，处理能力从 10 kg/h 到 150 t/h，可配套稀相、密相与中间相气力输送系统。本文把工作原理、选型判断点、型号对照、TPU 实测、安装位置与维护口径一次讲清楚，供工艺与设备工程师在选型和招标阶段直接引用。
这是被问得很多的问题，两者经常被混为一谈：
粒料在管道内高速输送时相互摩擦、与管壁碰撞，会产生细粉和拉丝，其中相当一部分因静电吸附在颗粒表面。普通旋风分离或袋式除尘针对的是气流中的尘粒，对“长在颗粒表面上”的微粉无能为力。两者服务对象不同，在一套完整的气力输送系统里通常配合使用：除尘器保证排气洁净，除粉器保证产品洁净。
带电颗粒进入除粉器的磁场区后，受洛伦兹力作用，颗粒与细粉之间的静电吸附被削弱；随后正压吹扫提供的洁净气流，把剥离下来的微细粉尘与拉丝带走。设备采用窄缝与孔板结构，拉丝去除效率高，且设计上不受物料流量波动影响——这一点对实际工况很重要，因为前端供料的波动在生产线上是常态。
对表面静电特别强的物料（如部分 PP、PE、TPU 粒料），微粉更难被气流带走，必要时可配合离子风预先消除静电，再进除粉器。TPU 还有一层特殊性：它吸湿，吹扫气如果直接取环境空气，等于一边除粉一边给物料加湿。此时闭路循环或干燥气源就不是“可选配置”，而是工艺条件的一部分。
同一台除粉器在不同工况下的实际除粉率差别可以很大。选型时按以下五项逐一确认，可以避免绝大多数后期纠纷：
① 处理量区间。按稳态处理量与峰值处理量分别核算，避免按平均值选小。XD-20~XD-90 覆盖 10 kg/h~150 t/h，峰值工况应在所选型号的能力范围内并留有裕量。
② 目标含粉率。明确给出进料含粉率与允许的出口含粉率，这两个数决定除粉级数，以及是否需要多级串联。例如在聚合装置中，PP、PE 粒料常要求含粉率控制到 15 ppm 级别，EVA 行业要求更高；进料含粉率显著高于设计值时，仅靠调节风量难以达标。
③ 气源条件。除粉需要稳定的正压气流，风量、压力以及是否使用氮气，要在订货前确认；气源波动会直接反映为除粉率波动。吸湿性物料还要确认是否闭路循环、气源露点是否受控。
④ 安装位置。料仓入口、装车/包装前、输送线末端，三种位置的空间与压损条件不同，进出料口方向与检修空间的要求也不同，需在布置图阶段确定。
⑤ 上下游匹配。前端旋转阀的供料稳定性、后端除尘系统的背压都会影响实际除粉效果，建议与旋转阀、除尘设备一并确定参数，而不是孤立选型。
除以上五项外，实际除粉率还受物料在除粉区的停留时间、气流分布均匀性、细粉带电状态以及颗粒形状影响。片状、破碎状物料比球形粒料更难处理：比表面积大、边缘毛刺多、静电吸附强，选型时不能直接套用新料粒料的口径。
| 型号 | 处理能力（t/h） | 外形尺寸（mm） |
|---|---|---|
| XD-20 | 20 | 400W × 700L × 900H |
| XD-30 | 30 | 400W × 700L × 1000H |
| XD-40 | 40 | 600W × 700L × 1000H |
| XD-50 | 50 | 600W × 900L × 1200H |
| XD-60 | 60 | 800W × 900L × 1200H |
| XD-90 | 90 | 1100W × 1150L × 1350H |
全系列覆盖 10 kg/h~150 t/h；超出表列能力，或有耐磨、抛光、冲洗式等特殊要求的工况，可按工况定制。详细参数见本站除粉器选型表与粒料除粉器外形尺寸。
把这次测试的记录放在一张表里，信息更清楚：
| 项目 | 测试记录 |
|---|---|
| 测试时间 | 2026-04-07 |
| 物料 | 万华化学 TPU 热塑性聚氨酯弹性体破碎片 |
| 来料状态 | 不规则片状，粉尘和破碎片较多 |
| 样品量 | 25 kg |
| 试验设备 | RC1，处理能力 150–350 kg/h |
| 除粉后状态 | 基本无细小粉尘和细小颗粒 |
| 收集粉尘 | 约占样品体积的 10% |
| 2 t/h 配置结论 | 配置 XP45 型号；因物料吸湿，建议采用闭路循环系统 |
这张表里有三个容易被误读的点，需要说清楚：
第一，10% 是体积占比，不是质量含粉率。破碎片的堆密度低、空隙大，粉尘蓬松，同样体积对应的质量远小于粒料。把 10% 直接当成“质量含粉率 10%”去推算 ppm，会得出完全错误的结论。对外报价和验收，必须统一到质量口径（或双方约定的检测方法），并注明取样方式。
第二，除粉后的“看不见”不等于“零”。报告写的是“基本无细小粉尘和细小颗粒”，这是目视与手感层面的判断；如果项目有 15 ppm 这类硬指标，仍需按约定方法做抽检，不能拿目视结果替代化验数据。
第三，TPU 的吸湿性会改变系统配置。普通粒料可以用开式正压吹扫；TPU 破碎片吸湿后，除粉气源如果直接取环境空气，物料在除粉段会再次吸湿，影响后续干燥与成型。报告因此建议闭路循环。这个结论不是除粉器本身“必须闭路”，而是物料特性倒推出来的系统条件。
说明：测试报告中的 RC1 为试验设备型号，XP45 为该项目按 2 t/h 核算的配置型号；官网在售的 XD 系列为产品型号体系，具体选型以工况核算为准。
两处都装时，前端负责粗除、末端负责精除，需要分别核算压损与空间。除粉器常用于气力输送系统末端、料仓前或包装前工序，布置阶段应同时确认检修空间与进出料口方向。若上游采用中间相输送，源头产粉量已经下降，末端除粉器的负荷会更平稳，但仍不能省——进料自带的微粉和换牌号残留的碎屑，仍需要末端兜底。
| 项目 | 周期 | 判据 / 处置 |
|---|---|---|
| 气路压力与风量 | 每日 | 偏离设定值即检查气源与管路泄漏 |
| 除粉腔与滤网 | 每月 | 积粉影响气流分布，按物料含粉率调整清灰周期 |
| 出口含粉率抽检 | 每季度 | 与中控记录比对，用于判断是否需要调整气量 |
| 易损件评估 | 每 6 个月 | 按磨损与堵塞情况更换滤网、密封件 |
Q1：除粉器和除尘器有什么区别？
除尘器处理输送气体中的悬浮粉尘，属气固分离设备；除粉器处理颗粒料表面的附着微粉与拉丝，属物料净化设备。两者服务对象不同，通常配合使用。
Q2：除粉器一定要接在旋转阀后面吗？
取决于工艺目标。装在料仓入口可减少仓内扬尘，装在装车/包装前直接控制成品含粉率；两处都装时前端粗除、末端精除，需分别核算压损与空间。
Q3：出口含粉率不达标怎么办？
先看气量是否稳定、停留时间是否足够，再看是否需要从单级改为多级串联；进料含粉率显著高于设计值时，仅靠调节风量难以达标。
Q4：气源可以用氮气吗？
可以。对惰性气体保护或洁净室应用，可在订货时说明，按闭路或惰性气体配置设计；气源的压力稳定性与洁净度要求需在选型时一并确认。
Q5：处理量波动大会影响除粉效果吗？
本系列采用正压吹扫供气与窄缝、孔板结构，设计上不受物料流量波动影响；但选型仍应按峰值处理量核算并留有裕量，避免长期超能力运行。
Q6：TPU 破碎料除粉，和 PP、PE 粒料有什么不同？
破碎料形状不规则、比表面积大、毛刺多，粉尘更容易附着；TPU 又吸湿，气源与系统形式要一并考虑。建议先做来料试验，再按实测结果定型号与是否闭路。
除粉器选型需要结合输送量、物料特性与现场气源条件逐项确认。欢迎来电沟通工况参数：
相关阅读：除粉器选型表 ｜ 粒料除粉器外形 ｜ 高压旋转阀厂家与供应商 ｜ 中间相气力输送（STRANDPHASE）是什么
In April 2026, a TPU compounding company sent 25 kg of incoming material to our test site. The material was Wanhua Chemical thermoplastic polyurethane (TPU) regrind — irregular flakes with visibly high levels of dust and fine particles. After a run through an RC1 test unit (capacity 150–350 kg/h), the dedusted sample showed essentially no fine dust or fine particles to the eye, and the collected dust accounted for roughly 10% of the sample volume.
The case illustrates a common misunderstanding: many plants assume that "dedusting" means filtering dust out of the conveying air. What actually determines product cleanliness is the fine powder, chips and angel hair adhering to the pellet surface. A DeDuster treats exactly that — it is a material cleaning device, not a dust collector.
Shanghai Conque Engineering Technology Co., Ltd. supplies the DeDuster series, covering models XD-20 to XD-90 with capacities from 10 kg/h to 150 t/h. The units can be integrated with dilute-phase, dense-phase and strand-phase pneumatic conveying systems. This article covers the working principle, five selection checkpoints, a model comparison, the TPU test, installation positions and maintenance intervals, so that process and equipment engineers can reference it directly during selection and tendering.
This is the most frequently asked question, and the two are often confused:
During high-speed conveying, pellets rub against each other and collide with the pipe wall, generating fines and angel hair; a significant part of it sticks to pellet surfaces through static electricity. Conventional cyclones or bag filters target dust entrained in the air stream and cannot remove powder that is attached to the pellet surface. Because they serve different targets, the two are normally used together in a complete conveying system: the dust collector keeps the exhaust air clean, and the deduster keeps the product clean.
Charged particles entering the magnetic zone of the deduster are subjected to Lorentz forces that weaken the electrostatic adhesion between pellets and fines. A clean, positive-pressure purge air stream then carries the detached fine dust and angel hair away. The unit uses narrow slots and perforated plates, giving high angel-hair removal efficiency, and is designed to be insensitive to fluctuations in material flow — important in real plants, where upstream feed variation is the norm.
For materials with exceptionally strong surface static (some PP, PE and TPU pellets), fines are harder to entrain. Ionized air can be used upstream to neutralize the charge before the material enters the deduster. TPU adds another complication: it is hygroscopic. If ambient air is used for purging, the unit removes dust and humidifies the material at the same time. In that case, a closed-loop or dried-air supply is not an optional extra but part of the process requirement.
The actual dedusting efficiency of the same unit can vary widely between duties. Confirming the following five points one by one avoids most disputes after commissioning:
1) Capacity range. Calculate the steady-state and peak throughput separately; do not size on the average. XD-20 to XD-90 cover 10 kg/h to 150 t/h. The peak duty must fall within the selected model's capacity with margin.
2) Target fines content. Specify both the inlet fines content and the allowable outlet fines content. These two figures determine the number of dedusting stages and whether multi-stage series operation is required. In polymerization plants, for example, PP and PE pellets are often required to be controlled to the 15 ppm level, and EVA applications are stricter. If the inlet fines content is significantly above the design value, adjusting air volume alone will not meet the target.
3) Air supply. Dedusting requires a stable positive-pressure air stream. Air volume, pressure and whether nitrogen is used must be confirmed before ordering; fluctuations in the air supply translate directly into fluctuations in dedusting efficiency. For hygroscopic materials, also confirm whether closed-loop operation is required and whether the air dew point is controlled.
4) Installation position. Silo inlet, before truck loading or bagging, and the end of the conveying line impose different space and pressure-loss conditions, and different requirements on inlet/outlet orientation and maintenance access. The position must be fixed at the layout stage.
5) Upstream and downstream matching. The feed stability of the upstream rotary valve and the back pressure of the downstream dust collection system both affect actual dedusting performance. Determine the parameters together with the rotary valve and dust collection equipment rather than selecting the deduster in isolation.
Beyond these five points, actual efficiency is affected by material residence time in the dedusting zone, air-flow distribution, the charge state of the fines and particle shape. Flake and regrind materials are harder to handle than spherical pellets: they have a larger specific surface, more edge burrs and stronger electrostatic adhesion, so the parameters for virgin pellets cannot be applied directly.
| Model | Capacity (t/h) | Dimensions (mm) |
|---|---|---|
| XD-20 | 20 | 400W × 700L × 900H |
| XD-30 | 30 | 400W × 700L × 1000H |
| XD-40 | 40 | 600W × 700L × 1000H |
| XD-50 | 50 | 600W × 900L × 1200H |
| XD-60 | 60 | 800W × 900L × 1200H |
| XD-90 | 90 | 1100W × 1150L × 1350H |
The full range covers 10 kg/h to 150 t/h. Duties beyond the table, or requiring wear protection, polishing or wash-down design, can be customized. Detailed data: deduster selection table and pellet deduster dimensions.
The test record is clearer in table form:
| Item | Test record |
|---|---|
| Test date | 2026-04-07 |
| Material | Wanhua Chemical TPU thermoplastic polyurethane regrind |
| Incoming condition | Irregular flakes, high dust and chip content |
| Sample size | 25 kg |
| Test unit | RC1, capacity 150–350 kg/h |
| Condition after dedusting | Essentially free of fine dust and fine particles |
| Collected dust | About 10% of sample volume |
| Conclusion for 2 t/h configuration | XP45 selected; closed-loop system recommended because the material is hygroscopic |
Three points in this table are easy to misread and need to be stated clearly:
First, 10% is a volume share, not a mass fines content. Regrind has low bulk density and high voidage, and the dust is fluffy, so the same volume corresponds to far less mass than pellets. Converting 10% directly into "10% fines by mass" and then into ppm leads to completely wrong conclusions. Quotations and acceptance tests must use a mass basis (or an agreed test method) and state the sampling procedure.
Second, "invisible" after dedusting does not mean zero. The report states "essentially no fine dust or fine particles", which is a visual and tactile judgement. If the project has a hard target such as 15 ppm, sampling must still follow the agreed method; visual inspection cannot replace laboratory data.
Third, the hygroscopicity of TPU changes the system configuration. Ordinary pellets can be purged with open-loop positive-pressure air. With hygroscopic TPU regrind, ambient purge air would re-moisten the material in the dedusting section and affect downstream drying and forming. The report therefore recommends closed-loop operation. The conclusion is not that a deduster "must" be closed-loop; it is a system condition derived from the material.
Note: RC1 in the test report is the test-unit model; XP45 is the configuration selected for that project at 2 t/h; the XD series offered on this website is the product line. Final selection is subject to duty-specific calculation.
When both positions are used, the upstream unit performs coarse dedusting and the terminal unit performs fine dedusting; pressure loss and space must be calculated separately. Dedusters are commonly installed at the end of pneumatic conveying systems, ahead of silos or before packing. Maintenance access and inlet/outlet orientation must be confirmed at the layout stage. If the upstream system uses strand-phase conveying, the amount of dust generated at the source is already lower and the terminal deduster load is more stable — but the deduster cannot be omitted, because incoming fines and residue from product changeovers still need to be removed at the end.
| Item | Interval | Criterion / action |
|---|---|---|
| Air pressure and volume | Daily | If it deviates from the set point, check the air supply and pipework for leaks |
| Dedusting chamber and screen | Monthly | Dust build-up affects air distribution; adjust the cleaning interval to the material's fines content |
| Outlet fines content sampling | Quarterly | Compare with control-room records to decide whether air volume needs adjustment |
| Wear-part assessment | Every 6 months | Replace screens and seals according to wear and blockage condition |
Q1: What is the difference between a deduster and a dust collector?
A dust collector handles airborne dust in the conveying gas and is a gas–solid separation device; a deduster handles fine powder and angel hair adhering to the pellet surface and is a material cleaning device. They serve different targets and are normally used together.
Q2: Must the deduster be installed after the rotary valve?
It depends on the process objective. At the silo inlet it reduces dust inside the silo; before loading or bagging it directly controls the fines content of the finished product. When both positions are used, the upstream unit performs coarse dedusting and the terminal unit fine dedusting; pressure loss and space must be calculated separately.
Q3: What if the outlet fines content does not meet the target?
First check whether the air volume is stable and the residence time is sufficient; then consider changing from a single stage to multi-stage series operation. If the inlet fines content is significantly above the design value, adjusting air volume alone will not be enough.
Q4: Can nitrogen be used as the purge gas?
Yes. For inert-gas protection or cleanroom applications, state this at the ordering stage and the unit will be designed for closed-loop or inert-gas operation. Pressure stability and cleanliness of the gas supply must be confirmed during selection.
Q5: Does a large throughput fluctuation affect dedusting performance?
This series uses positive-pressure purge air with narrow-slot and perforated-plate structures and is designed to be insensitive to material flow fluctuation. Selection must still be based on peak throughput with margin, to avoid long-term operation above capacity.
Q6: How does dedusting TPU regrind differ from PP or PE pellets?
Regrind has an irregular shape, a larger specific surface and more burrs, so dust adheres more readily; TPU is also hygroscopic, so the air supply and system configuration must be considered together. We recommend an incoming-material test first, then selecting the model and whether closed-loop operation is required based on the measured result.
Deduster selection requires confirming throughput, material characteristics and site air-supply conditions item by item. Please contact us with your duty parameters:
Related reading: deduster selection table | pellet deduster dimensions | high-pressure rotary valve manufacturer and supplier | What Is Strand-Phase Pneumatic Conveying (STRANDPHASE)?
