負(fù)壓氣力輸送系統(tǒng)（也稱(chēng)負(fù)壓風(fēng)送系統(tǒng)或負(fù)壓風(fēng)運(yùn)輸送系統(tǒng)）是高壓離心風(fēng)機(jī)產(chǎn)生的真空將散裝粉粒體物料用負(fù)壓氣流吸送到指定的容器（料倉(cāng)），負(fù)壓吸送式氣力輸送裝置為核心組成的真空負(fù)壓收集系統(tǒng)，特別適用于短距離、物料溫度高、多點(diǎn)卸料的系統(tǒng)中。

The negative pressure pneumatic conveying system (also known as the negative pressure air conveying system or negative pressure air conveying system) is a vacuum generated by a high-pressure centrifugal fan that sucks bulk powder materials into a designated container (silo) using negative pressure airflow. The negative pressure suction pneumatic conveying device is the core component of the vacuum negative pressure collection system, especially suitable for short distance, high material temperature, and multi-point unloading systems.

負(fù)壓吸送氣力輸送設(shè)備散裝物料抽吸機(jī)由吸嘴、液壓吸臂、分離卸料裝置、鼓風(fēng)機(jī)(真空泵)、電控系統(tǒng)等組成?？芍苯踊蛲ㄟ^(guò)輸送機(jī)械將物料送入散裝物料庫(kù)(倉(cāng))。散裝物料氣力輸送系統(tǒng)由負(fù)壓氣力輸送設(shè)備(吸嘴、液壓吸臂、分離裝置、鼓風(fēng)機(jī)或真空泵)和正壓氣力輸送設(shè)備(倉(cāng)式泵、組合泵、空氣壓縮機(jī))以及電控系統(tǒng)組成。

The negative pressure suction pneumatic conveying equipment for bulk material suction is composed of a suction nozzle, a hydraulic suction arm, a separation and unloading device, a blower (vacuum pump), an electrical control system, etc. Materials can be directly or through conveying machinery into bulk material warehouses (silos). The bulk material pneumatic conveying system consists of negative pressure pneumatic conveying equipment (suction nozzle, hydraulic suction arm, separation device, blower or vacuum pump) and positive pressure pneumatic conveying equipment (bin pump, combination pump, air compressor) as well as an electrical control system.

負(fù)壓吸送式氣力輸送原理

The principle of negative pressure suction pneumatic conveying

負(fù)壓吸送式氣力輸送的流化倉(cāng)是利用空氣使粉煤灰顆粒能夠充分地形成流態(tài)化狀態(tài)，從而使粉煤灰能夠順利地進(jìn)入負(fù)壓吸灰正壓輸送管道。負(fù)壓吸灰流化倉(cāng)內(nèi)部是由兩塊多孔薄鋼板組成的，在上下多孔板之間夾有透氣層。整個(gè)流化倉(cāng)內(nèi)部的多孔板按一定斜度（4%-10%）布置。粉煤灰由分離器進(jìn)入組合泵，由組合泵進(jìn)入流化倉(cāng)，加料設(shè)備加入上殼體的加料口的透氣層上?？諝庥闪骰瘋}(cāng)進(jìn)入入下殼體，并沿流化倉(cāng)透過(guò)透氣層，使粉煤灰流態(tài)化。進(jìn)入輸送機(jī)械送出或進(jìn)入正壓輸送設(shè)備內(nèi)，由空氣壓縮機(jī)或羅茨風(fēng)機(jī)產(chǎn)生的正壓，經(jīng)過(guò)送料管道，將物料送入散裝物料庫(kù)(倉(cāng))。而清潔的空氣則由分離器上部排出經(jīng)排風(fēng)管道，從羅茨鼓風(fēng)機(jī)(真空泵)排氣口排入大氣。

The fluidized bin of negative pressure suction pneumatic conveying utilizes air to fully form a fluidized state of fly ash particles, so that fly ash can smoothly enter the negative pressure suction positive pressure conveying pipeline. The interior of the negative pressure ash suction fluidized bed is composed of two porous thin steel plates, with a breathable layer sandwiched between the upper and lower porous plates. The porous plates inside the entire fluidized bed are arranged at a certain slope (4% -10%). The fly ash enters the combined pump through the separator, and then enters the fluidized bin through the combined pump. The feeding equipment is added to the breathable layer of the feeding port of the upper shell. The air enters the lower shell through the fluidized bed and passes through the breathable layer along the fluidized bed to fluidize the fly ash. The positive pressure generated by the air compressor or Roots blower enters the conveying machinery to deliver or enter the positive pressure conveying equipment. Through the feeding pipeline, the material is sent to the bulk material warehouse (warehouse). And clean air is discharged from the upper part of the separator through the exhaust duct, and is discharged into the atmosphere through the exhaust port of the Roots blower (vacuum pump).

吸送式氣力輸送設(shè)備組成：

Composition of suction pneumatic conveying equipment:

負(fù)壓吸送裝置的主要組成部件為分離器，吸嘴（分固定式吸嘴和可移動(dòng)式吸嘴），卸料器，真空泵，閥門(mén)及管件，控制系統(tǒng)等，適用于粉狀物料的中短距離輸送。由于輸送過(guò)程全部是在密閉的負(fù)壓管道中完成，所以在輸送線路上不會(huì)產(chǎn)生任何泄漏和污染，尤其適用于有嚴(yán)格泄漏污染要求的有害物質(zhì)的輸送。輸送系統(tǒng)既可以單點(diǎn)供料，也可以多點(diǎn)供料，工藝布置靈活方便。

The main components of the negative pressure suction device are the separator, suction nozzle (divided into fixed suction nozzle and movable suction nozzle), unloader, vacuum pump, valve and pipe fittings, control system, etc., suitable for medium and short distance transportation of powdered materials. Due to the fact that the entire transportation process is completed in a closed negative pressure pipeline, there will be no leakage or pollution on the transportation line, especially suitable for the transportation of harmful substances with strict leakage and pollution requirements. The conveying system can provide both single point and multi-point feeding, with flexible and convenient process layout.

負(fù)壓吸送式氣力輸送裝置系統(tǒng)優(yōu)勢(shì)：

Advantages of negative pressure suction pneumatic conveying device system:

輸送管道中壓力低于環(huán)境壓力，粉塵不向外泄漏，是輸送有毒性物料的最佳選擇，常用于卸船、真空上料、清潔等應(yīng)用。適合多點(diǎn)到一點(diǎn)的輸送。輸送線路為負(fù)壓管路狀態(tài)，輸送過(guò)程中無(wú)泄漏，無(wú)污染；輸送狀態(tài)為均勻連續(xù)，輸送量可以調(diào)節(jié)；氣源裝置采用干式負(fù)壓氣源，簡(jiǎn)單可靠；分離裝置采用高效過(guò)濾材料和脈沖噴吹，結(jié)構(gòu)緊湊，分離效率高；吸嘴裝置可根據(jù)不同的應(yīng)用場(chǎng)合和工藝要求進(jìn)行專(zhuān)門(mén)設(shè)計(jì)；輸送系統(tǒng)的設(shè)備配置簡(jiǎn)單，系統(tǒng)投資??；系統(tǒng)維護(hù)量低，檢修方便。

The pressure in the conveying pipeline is lower than the environmental pressure, and dust does not leak out. It is the best choice for transporting toxic materials and is commonly used in applications such as unloading ships, vacuum loading, and cleaning. Suitable for conveying from multiple points to one point. The conveying line is in a negative pressure pipeline state, and there is no leakage or pollution during the conveying process; The conveying state is uniform and continuous, and the conveying amount can be adjusted; The air source device adopts a dry negative pressure air source, which is simple and reliable; The separation device adopts high-efficiency filtering materials and pulse injection, with a compact structure and high separation efficiency; The suction nozzle device can be specially designed according to different application scenarios and process requirements; The equipment configuration of the conveying system is simple, and the system investment is small; Low system maintenance and convenient maintenance.

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