正壓氣力輸灰系統(tǒng)是行業(yè)中常用的系統(tǒng)，適用于大多數(shù)給料機(jī)，如文丘里、螺桿泵和倉泵。通過在管道系統(tǒng)上附加一個(gè)雙向閥，可以實(shí)現(xiàn)多點(diǎn)卸載和進(jìn)料。然而，過多的多點(diǎn)饋線會(huì)造成大量的空氣泄漏。特別是對(duì)于旋轉(zhuǎn)刀片給料機(jī)，泄漏約占總供氣量的20%。

Positive pressure pneumatic ash conveying system is a common system in the industry, which is suitable for most feeders, such as venturi, screw pump and bin pump. By attaching a two-way valve to the pipeline system, multi-point unloading and feeding can be realized. However, too many multipoint feeders will cause a lot of air leakage. Especially for the rotary blade feeder, the leakage accounts for about 20% of the total air supply.

負(fù)壓氣力輸灰系統(tǒng)適用于將物料從多個(gè)供應(yīng)點(diǎn)運(yùn)送到一個(gè)卸料點(diǎn)。其優(yōu)點(diǎn)是通過給料機(jī)的漏風(fēng)和壓降非常小，使旋片給料機(jī)能夠產(chǎn)生滿意的效果。負(fù)壓氣力輸灰系統(tǒng)是國內(nèi)常用的小體積水泥堆場(chǎng)卸料系統(tǒng)。

The negative pressure pneumatic ash conveying system is suitable for transporting materials from multiple supply points to one unloading point. Its advantage is that the air leakage and pressure drop of the feeder are very small, so that the rotary feeder can produce satisfactory results. Negative pressure pneumatic ash conveying system is a commonly used unloading system for small volume cement storage yard in China.

混合系統(tǒng)比普通混合系統(tǒng)能更好地輸送材料。在許多車間，普通的混合系統(tǒng)是短程物料輸送的理想選擇，但系統(tǒng)壓力低限制了物料的輸送量和輸送距離。兩級(jí)混合系統(tǒng)采用中間室將負(fù)壓氣力輸灰系統(tǒng)與正壓氣力輸灰系統(tǒng)分離，并將負(fù)壓氣力輸灰系統(tǒng)和正壓系統(tǒng)所需的氣源分為兩個(gè)獨(dú)立的供氣裝置，讓您分別選擇優(yōu)的真空泵和空壓機(jī)。由于有兩個(gè)獨(dú)立的系統(tǒng)，整個(gè)系統(tǒng)需要一個(gè)氣體分離器。詮釋正壓氣力輸灰系統(tǒng)與負(fù)壓的選擇的要點(diǎn)-給料機(jī)

The mixing system can transport materials better than the ordinary mixing system. In many workshops, the ordinary mixing system is an ideal choice for short-range material conveying, but the low system pressure limits the conveying capacity and distance of materials. The two-stage mixing system adopts an intermediate chamber to separate the negative pressure pneumatic ash conveying system from the positive pressure pneumatic ash conveying system, and divides the air source required by the negative pressure pneumatic ash conveying system and the positive pressure system into two independent air supply devices, so that you can choose excellent vacuum pump and air compressor respectively. Since there are two independent systems, the whole system needs a gas separator. Explain the key points of the selection of positive pressure pneumatic ash conveying system and negative pressure - feeder

給料機(jī)

Feeder

正壓氣力輸灰系統(tǒng)與負(fù)壓的選擇的要點(diǎn)關(guān)鍵是看給料機(jī)，選擇給料機(jī)是系統(tǒng)設(shè)計(jì)中重要的因素。各種給料機(jī)都有系統(tǒng)壓力的佳使用范圍。其中倉泵一般用于高壓間歇運(yùn)行。旋片式給料機(jī)和雙瓣閥給料機(jī)可用于氣力輸灰系統(tǒng)和負(fù)壓供應(yīng)，但通常限制在較低的壓差范圍內(nèi)。螺桿泵在高壓下工作良好，但在實(shí)際使用中，它們?nèi)匀痪窒抻谥?、低壓范圍。?fù)壓吸入噴嘴只用于負(fù)壓氣力輸灰系統(tǒng)和混合系統(tǒng)。換句話說，給料機(jī)的選擇綜合考慮乘客壓力值、漏風(fēng)、壓降和流量控制以及特定物料的適用性等因素。

The key point of the selection of positive pressure pneumatic ash conveying system and negative pressure is to look at the feeder, and the selection of feeder is an important factor in the system design. All kinds of feeders have a good application range of system pressure. The bin pump is generally used for high-pressure intermittent operation. Rotary vane feeder and double flap valve feeder can be used for pneumatic ash conveying system and negative pressure supply, but they are usually limited to a low differential pressure range. Screw pumps work well under high pressure, but in practical use, they are still limited to the range of medium and low pressure. Negative pressure suction nozzle is only used for negative pressure pneumatic ash conveying system and mixing system. In other words, the selection of feeder comprehensively considers factors such as passenger pressure value, air leakage, pressure drop and flow control, as well as the applicability of specific materials.

額定壓力值。由于不同的管道壓降和管道內(nèi)徑適用于不同的設(shè)備，應(yīng)考慮選擇額定壓力較高的給料機(jī)來供應(yīng)較小的管徑管道。對(duì)于特定的管道內(nèi)徑，給料機(jī)在較大額定壓力下產(chǎn)生較大吞吐量。

Rated pressure. Since different pipe pressure drop and pipe inner diameter are applicable to different equipment, the feeder with higher rated pressure should be considered to supply pipes with smaller diameter. For a specific pipe inner diameter, the feeder produces a large throughput under a large rated pressure.

壓降。通過給料機(jī)的壓降應(yīng)該盡可能小。普通螺桿泵和倉式泵的壓降分別為50kpa和20kpa左右。文丘里給料機(jī)的壓降與氣力輸灰系統(tǒng)輸送管道的壓降基本相同。旋葉式給料機(jī)和雙瓣式給料機(jī)的壓降可以忽略不計(jì)。

Pressure drop. The pressure drop through the feeder should be as small as possible. The pressure drop of ordinary screw pump and bin pump is about 50kPa and 20KPa respectively. The pressure drop of Venturi feeder is basically the same as that of pneumatic ash conveying system. The pressure drop of rotary vane feeder and double flap feeder is negligible.

流控制。如果需要保持供料量恒定，建議采用螺桿泵、氣鎖旋葉給料機(jī)、雙瓣閥給料機(jī)，以保證定量供料，滿足氣鎖要求。文丘里給料機(jī)不能提供氣閘，需要計(jì)量設(shè)備來維持穩(wěn)定的供應(yīng)。燃料泵在排放時(shí)調(diào)節(jié)料氣混合物的流量，以實(shí)現(xiàn)流量控制。

Flow control. If it is necessary to keep the feeding volume constant, screw pump, air lock rotary vane feeder and double flap valve feeder are recommended to ensure quantitative feeding and meet the air lock requirements. Venturi feeders cannot provide airlocks and require metering equipment to maintain a stable supply. The fuel pump regulates the flow of the feed gas mixture during discharge to realize flow control.

給料機(jī)有很多種，如旋片式給料機(jī)、螺桿泵、倉式泵和溫弗萊泵，它們的性能各不相同。提供了各種饋線的選擇指南。你需要考慮的氣力輸灰系統(tǒng)操作壓力范圍的饋線和供應(yīng)的體積和供應(yīng)距離的限制。

There are many kinds of feeders, such as rotary vane feeder, screw pump, bin pump and Winfrey pump, and their performance is different. Guidelines for the selection of various feeders are provided. You need to consider the limits of feeder and supply volume and supply distance in the operating pressure range of pneumatic ash conveying system.

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