倉泵作為氣力輸送系統(tǒng)的核心設(shè)備,其容量選擇直接影響輸送效率、能耗與系統(tǒng)穩(wěn)定性。合適的倉泵容量需結(jié)合物料特性、輸送需求、系統(tǒng)配置等多方面因素綜合確定,既避免因容量不足導(dǎo)致輸送中斷,也防止容量過大造成資源浪費(fèi)。
As the core equipment of the pneumatic conveying system, the capacity selection of the bin pump directly affects the conveying efficiency, energy consumption, and system stability. The appropriate capacity of the warehouse pump needs to be determined comprehensively based on various factors such as material characteristics, conveying requirements, and system configuration, in order to avoid conveying interruptions caused by insufficient capacity and prevent resource waste caused by excessive capacity.
物料特性是決定倉泵容量的基礎(chǔ)因素。不同物料的物理性質(zhì)對(duì)倉泵容量需求差異顯著:顆粒狀物料流動(dòng)性好,填充倉泵時(shí)不易搭橋,可選擇較大容量,單次輸送量高且不易堵塞;粉狀物料易受潮結(jié)塊,流動(dòng)性差,若倉泵容量過大,可能因物料在倉內(nèi)滯留時(shí)間過長(zhǎng)形成板結(jié),導(dǎo)致卸料不暢,這類物料更適合中小容量倉泵,通過縮短單次輸送周期減少結(jié)塊風(fēng)險(xiǎn)。物料堆積密度同樣關(guān)鍵,高密度物料需匹配較小容量倉泵,避免單次裝載過重超出輸送管道承重上限;低密度物料則可選用大容量倉泵,提高單位時(shí)間輸送量。
The material characteristics are the fundamental factors determining the capacity of the warehouse pump. The physical properties of different materials have significant differences in the demand for warehouse pump capacity: granular materials have good fluidity, making it difficult to build bridges when filling the warehouse pump. Larger capacities can be selected, with high single delivery capacity and less likely to clog; Powdered materials are prone to moisture and clumping, with poor flowability. If the capacity of the warehouse pump is too large, it may form clumping due to the prolonged retention time of the material in the warehouse, resulting in poor discharge. This type of material is more suitable for small and medium-sized warehouse pumps, reducing the risk of clumping by shortening the single conveying cycle. The stacking density of materials is equally critical, and high-density materials need to be matched with smaller capacity bin pumps to avoid single loading exceeding the upper limit of the conveying pipeline's load-bearing capacity; For low-density materials, a large capacity bin pump can be used to increase the conveying capacity per unit time.
輸送量與輸送距離決定倉泵容量的基本范圍。若系統(tǒng)要求每小時(shí)輸送一定量物料,且已知單次輸送周期,理論上倉泵容量需滿足相應(yīng)的輸送次數(shù),結(jié)合物料堆積密度可推算所需容量。輸送距離對(duì)容量選擇的影響體現(xiàn)在壓力損失上:短距離輸送時(shí),管道阻力小,倉泵可在較短時(shí)間內(nèi)完成卸料,適合選用大容量倉泵以減少輸送次數(shù);長(zhǎng)距離輸送時(shí),管道阻力大,單次輸送時(shí)間延長(zhǎng),若容量過大,會(huì)導(dǎo)致系統(tǒng)等待時(shí)間過長(zhǎng),反而降低效率,此時(shí)宜選擇中小容量倉泵,通過增加輸送頻次維持總輸送量。
The conveying volume and distance determine the basic range of the capacity of the bin pump. If the system requires a certain amount of material to be conveyed per hour and the single conveying cycle is known, theoretically the capacity of the bin pump needs to meet the corresponding conveying times, and the required capacity can be calculated based on the material packing density. The influence of conveying distance on capacity selection is reflected in pressure loss: during short distance conveying, the pipeline resistance is small, and the bin pump can complete unloading in a relatively short time, making it suitable to choose a large capacity bin pump to reduce the number of conveying times; When transporting over long distances, the pipeline resistance is high, and the single delivery time is prolonged. If the capacity is too large, it will cause the system to wait for too long, which will actually reduce efficiency. At this time, it is advisable to choose small and medium capacity bin pumps to maintain the total delivery volume by increasing the delivery frequency.
系統(tǒng)配套設(shè)備的能力制約倉泵容量的上限。倉泵的進(jìn)料方式影響實(shí)際有效容量:重力進(jìn)料時(shí),倉泵容量可接近幾何容積;螺旋給料因需預(yù)留螺旋運(yùn)轉(zhuǎn)空間,容量利用率較低,選擇時(shí)需適當(dāng)放大容量。供氣設(shè)備的排氣量與壓力需與倉泵容量匹配,大容量倉泵單次輸送需消耗大量壓縮空氣,若空壓機(jī)排氣量不足,會(huì)導(dǎo)致加壓時(shí)間過長(zhǎng),延長(zhǎng)輸送周期,此時(shí)需降低倉泵容量以適應(yīng)供氣能力。此外,輸送管道直徑也需匹配倉泵容量,大容量倉泵需搭配大直徑管道,避免因管道過細(xì)導(dǎo)致物料流速過高,加劇管道磨損。
The capacity of the supporting equipment of the system restricts the upper limit of the capacity of the warehouse pump. The feeding method of the bin pump affects the actual effective capacity: when feeding by gravity, the bin pump capacity can approach the geometric volume; Spiral feeding requires reserved space for spiral operation, resulting in low capacity utilization. When selecting, the capacity should be appropriately enlarged. The exhaust volume and pressure of the gas supply equipment need to be matched with the capacity of the bin pump. A large capacity bin pump consumes a large amount of compressed air for a single delivery. If the exhaust volume of the air compressor is insufficient, it will cause a long pressurization time and prolong the delivery cycle. At this time, the capacity of the bin pump needs to be reduced to adapt to the gas supply capacity. In addition, the diameter of the conveying pipeline also needs to match the capacity of the bin pump. Large capacity bin pumps need to be matched with large-diameter pipelines to avoid excessive material flow rate caused by thin pipelines, which can exacerbate pipeline wear.
運(yùn)行經(jīng)濟(jì)性與操作便利性是容量選擇的重要補(bǔ)充。大容量倉泵單次輸送量大,裝料次數(shù)少,可減少操作人員勞動(dòng)強(qiáng)度,適合自動(dòng)化程度高的系統(tǒng);但設(shè)備初期投資高,且清理維護(hù)難度大。小容量倉泵初期投資低,維護(hù)方便,適合間歇式輸送或人工操作場(chǎng)景,但需頻繁裝料,長(zhǎng)期運(yùn)行的人工成本較高。對(duì)于連續(xù)運(yùn)行的生產(chǎn)線,建議選擇中等容量倉泵,平衡單次輸送量與操作頻率,既能滿足連續(xù)輸送需求,又可通過自動(dòng)化控制系統(tǒng)實(shí)現(xiàn)無人值守,降低綜合成本。
Economic efficiency and operational convenience are important supplements to capacity selection. Large capacity bin pumps have a large single delivery capacity and fewer loading times, which can reduce the labor intensity of operators and are suitable for highly automated systems; But the initial investment in equipment is high, and cleaning and maintenance are difficult. Small capacity bin pumps have low initial investment, easy maintenance, and are suitable for intermittent conveying or manual operation scenarios, but require frequent loading and high labor costs for long-term operation. For continuous production lines, it is recommended to choose medium capacity bin pumps to balance the single delivery volume and operating frequency, which can meet the continuous delivery needs and achieve unmanned operation through automated control systems, reducing overall costs.
特殊工況對(duì)倉泵容量有針對(duì)性要求。在高海拔地區(qū),空氣密度降低,倉泵排氣時(shí)間延長(zhǎng),需適當(dāng)減小容量,避免因排氣不徹底影響下一次裝料;高溫環(huán)境中,大容量倉泵的保溫成本高,且物料易因滯留時(shí)間長(zhǎng)發(fā)生質(zhì)變,宜選用小容量倉泵并縮短輸送周期。對(duì)于易燃易爆物料,倉泵容量需與防爆系統(tǒng)匹配,過大容量可能因內(nèi)部可燃物積累增加爆炸風(fēng)險(xiǎn),通常控制在較小范圍內(nèi),并配合惰性氣體保護(hù),確保運(yùn)行安全。
Special working conditions have targeted requirements for the capacity of the warehouse pump. In high-altitude areas, air density decreases and the exhaust time of the bin pump is prolonged. It is necessary to reduce the capacity appropriately to avoid incomplete exhaust affecting the next loading; In high temperature environments, the insulation cost of large capacity bin pumps is high, and materials are prone to qualitative changes due to long retention time. Therefore, it is advisable to choose small capacity bin pumps and shorten the conveying cycle. For flammable and explosive materials, the capacity of the warehouse pump should be matched with the explosion-proof system. Excessive capacity may increase the risk of explosion due to the accumulation of internal combustibles. It is usually controlled within a small range and combined with inert gas protection to ensure safe operation.
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