如何选择适合的气力输送系统？

 如何选择适合的气力输送系统？空气输送，真空输送系统 # 气力输送系统选型指南（中英对照） 结合**物料特性、输送工况、现场条件**三大核心维度分步选型，兼顾成本、效率与稳定性。 ## 一、**步：梳理物料基础参数（核心依据） ### 中文 1. **物料形态** 粉末、颗粒、纤维、片状、易碎/易磨物料、粘性/吸潮物料，形态决定流态与风速。 2. **物理指标** 堆积密度、粒径、含水率、结块性、磨蚀性、易燃易爆性。 3. **特殊要求** 是否要求防破碎、防混料、食品/医药级洁净、防静电。 ### English 1. **Material form** Powder, granule, fiber, flake, fragile, abrasive, sticky or moisture-absorbent materials, which determine flow regime and air velocity. 2. **Physical parameters** Bulk density, particle size, moisture content, caking property, abrasiveness, flammability and explosiveness. 3. **Special requirements** Anti-breakage, no cross-contamination, food/medical grade cleanliness and anti-static demand. --- ## 二、**步：明确输送工况参数 ### 中文 1. **输送产量**：小时产能，区分常规工况与峰值产能。 2. **输送距离**：水平距离、垂直提升高度、管路总长（含弯头/三通）。 3. **进出料点位**：多点取料单点卸料 / 单点取料多点卸料。 4. **工作时长**：间歇运行 / 24小时连续运转。 ### English 1. **Capacity**: Hourly throughput, including normal and peak output. 2. **Conveying distance**: Horizontal length, vertical lift height and total pipeline length (including elbows and tees). 3. **Feeding & discharging points**: Multi-inlet single-outlet or single-inlet multi-outlet. 4. **Operation mode**: Intermittent or 24-hour continuous running. --- ## 三、第三步：选定输送压力形式 ### 中文 1. **负压吸送式（负压系统）** 适用：**短距离、多点取料、原料集中收集、上料工位分散**；粉尘零外溢，现场洁净。 局限：输送距离短、产能有限，不适合长距离分配。 2. **正压压送式（正压系统）** 适用：**中长距离、大产能、单点进料多点卸料、物料分配**；输送距离远、负载大。 局限：管路密封要求高，负压段易漏粉。 3. **混合式系统** 适用：取料分散+长距离输送的复杂工况；造价与结构复杂度偏高。 ### English 1. **Negative pressure (suction type)** Application: Short distance, multi-point feeding, centralized material collection and scattered feeding stations. No dust leakage. Limitation: Limited conveying distance and throughput, not for long-distance distribution. 2. **Positive pressure (pressure type)** Application: Medium & long distance, large capacity, single-point feeding & multi-point discharging and material distribution. Long conveying range and heavy load. Limitation: High requirement for pipeline sealing, easy dust leakage at negative pressure sections. 3. **Combined type** Application: Complex working conditions with scattered feeding and long-distance transportation. Higher cost and more complex structure. --- ## 四、第四步：选定物料流态形式 ### 中文 1. **稀相输送** 气流速度高、气料比低；通用性强、不易堵管、造价低。 适用：绝大多数普通粉末、颗粒、干料，磨损/破碎要求不高的场景。 2. **密相输送** 低速输送、气料比高、能耗低、物料磨损极小。 适用：**易碎颗粒、易氧化原料、高价值物料、磨蚀性强粉料**；距离中等、产能适中场景。 ### English 1. **Dilute phase conveying** High air velocity, low air-material ratio. Good versatility, low blockage risk and low cost. Application: Common dry powder and granules with low requirements on material breakage and abrasion. 2. **Dense phase conveying** Low air velocity, high air-material ratio, low energy consumption and minimal material abrasion. Application: Fragile granules, easily oxidized materials, high-value materials and highly abrasive powder; medium distance and moderate capacity. --- ## 五、第五步：匹配核心主机与配套部件 ### 中文 1. **动力源选型** - 小风量、负压吸送：旋涡气泵、真空泵 - 中大流量、长距离正压：罗茨风机（主流） - 高压密相输送：空气压缩机 2. **卸料/锁气装置** 常规颗粒/粉料选用标准旋转卸料阀；细粉、高压工况选用**密封加强型**；食品/医药选用卫生级款式。 3. **管路与管件** 磨蚀性物料：选用耐磨弯头、加厚管道；易堵物料：大曲率弯头、减少变径与直角弯。 4. **除尘分离装置** 普通粉尘：旋风分离器；细粉、高环保要求：布袋除尘器；防爆工况选用防爆型除尘设备。 ### English 1. **Power unit selection** - Small flow & negative pressure: Vortex pump, vacuum pump - Medium/large flow & long-distance positive pressure: Roots blower (mainstream) - High-pressure dense phase: Air compressor 2. **Airlock device** Standard rotary airlock for common powder/granules; reinforced sealing type for fine powder and high pressure; sanitary type for food & pharmaceutical industry. 3. **Pipeline & fittings** Wear-resistant elbows and thickened pipes for abrasive materials; large-curvature elbows for easy-blocking materials, reduce reducers and right-angle bends. 4. **Dust & separation equipment** Cyclone separator for ordinary dust; bag dust collector for fine powder and strict environmental standards; explosion-proof type for flammable & explosive working conditions. --- ## 六、第六步：结合现场与预算*终敲定 ### 中文 1. **现场空间**：空间狭小优先负压系统，管路布置更灵活。 2. **环保要求**：高粉尘管控、洁净车间优先全密闭负压+高效除尘。 3. **运维能力**：预算有限、维护人员少，优先结构简单的稀相负压系统。 4. **防爆/防静电**：粉体涉爆、易燃原料，全套选用防爆、防静电配置。 5. **远期扩容**：预留风量、管路余量，满足后期产能提升。 ### English 1. **Site space**: Choose negative pressure system for narrow space with flexible pipeline layout. 2. **Environmental standard**: Fully enclosed negative pressure system plus high-efficiency dust collector for dust-sensitive and clean workshops. 3. **Operation & maintenance**: Select simple dilute-phase negative pressure system for limited budget and less maintenance staff. 4. **Explosion & static protection**: Adopt full explosion-proof and anti-static configuration for flammable powder. 5. **Future expansion**: Reserve margin for air volume and pipelines to support capacity upgrade. --- ## 快速选型总结表（精简版） | 工况特点 | 推荐系统类型 | | ---- | ---- | | 短距离、多点上料、无尘要求 | 负压稀相 | | 中长距离、大产能、多点卸料 | 正压稀相 | | 物料易碎/高价值、低磨损要求 | 正压密相 | | 取料分散+长距离输送 | 混合式系统 |