使用羅茨真空泵裝置的主要優(yōu)點以及如何選擇相關設備?讓我們有一個簡要的了解。

　　(1)降低功耗：一般羅茨真空泵的功耗僅為其他設備功耗的40%～50%。之所以能達到這種節(jié)油效果，是因為采用了帶有氣水分離裝置的羅茨真空泵，采用了自吸式離心泵。

　　對比示例：容量為52m3/min、真空度為4x104pa(絕壓為6x104pa)的容器，泵軸上的功率對比：液環(huán)泵為95HP，容量與功率的公差為± 10%。如果使用單級羅茨真空泵，則為55馬力，容量和功率公差為±5%。

　　(2)操作靈活：真空泵的容量可通過調節(jié)裝置調節(jié)至所需值，并有*小比功率值。羅茨真空泵屬于變?nèi)萘啃停芍付?5%的儲備。如果在制造過程中沒有適當考慮(或多或少)所需的輸送能力，正確的處理方法是改變皮帶輪直徑和改變速度，則可以獲得理想的運行效果。

　　羅茨真空泵是變?nèi)荼茫裕孩偃萘颗c轉速成正比，②所需功率與轉速和產(chǎn)生的壓力成正比。

　　在任何情況下，羅茨真空泵都可以將轉速降低50%，同時也能保證以上優(yōu)點。

　　(3)提高工作質量：真空度可以通過一定的方法得到，但與泵抽水量無關。在羊皮紙版材的生產(chǎn)中，在真空床上安裝了一臺液環(huán)真空泵，可以觀察到各種真空度的變化，**壓力為40-45mmhg。真空床上裝有分離器和羅茨真空泵，**壓力為5mmhg，使用同一臺記錄儀。

　　(4)自我保護：紙機一旦運行，一般不停機。實際工作中采用自保護系統(tǒng)，即用兩臺規(guī)格相同的可互換真空泵組成一個兩級真空泵組，僅由一臺電機驅動。如果一個停止工作，另一個可以繼續(xù)工作。但管道要鋪設好。此時，線速度和真空度可能會暫時略微降低。

　　(5)常用的四種基本方法如下：①帶分離器的真空泵;②在網(wǎng)眼部分和毛料部分放置分離裝置;③為保證每臺紙機的真空度，可建立中央真空機組;④分離裝置可以解決高真空度和低真空度的問題。

　　(6)真空裝置可以安裝在任何合適的位置。由于羅茨真空泵只抽空氣，因此可隨意放置在距真空點100m以內(nèi)。**需要注意的是，空氣通過管道時會產(chǎn)生壓差(非常小)。**避開管道中的低壓區(qū)。分離式氣水分離器(柱式下降分離器、分離箱等)均安裝在帶有真空點的封閉系統(tǒng)中。

　　(7) 浸水泵是無害的羅茨真空泵，能夠承受意外浸水。它可以把水抽出來。

　　(8)無需減少維護工作，因為：①氣水分離，防止機器因腐蝕和磨損而損壞;② 由羅茨真空泵的結構決定(因為部件不相互接觸)。

　　(9) 需要很少或不需要水。羅茨真空泵可以減少用水量。一般容量為52m3/min的液環(huán)真空泵需要至少10000l/h的純無鈣冷水才能獲得300MMHG的真空度，而羅茨真空泵可以在無水或少量水的情況下運行。

　　為了獲得更高的真空度，建議使用兩級或三級泵組合(即兩級或三級泵串聯(lián))，并用少量水滲透(約400L/h)。

　　滲水的目的是：①在琉山壓縮空氣產(chǎn)生的發(fā)熱體;②提高真空泵的容積效率;③獲得*小功率。

　　上海瑞柘環(huán)保設備集團有限公司生產(chǎn)銷售羅茨真空泵已有10余年，公司自2008成立后，多次與國外某企業(yè)洽談合作。并引進其相應的生產(chǎn)技術，成功實現(xiàn)了自主生產(chǎn)!所有產(chǎn)品劃分清晰，產(chǎn)品參數(shù)詳細齊全，部分大型羅茨真空泵可根據(jù)客戶需求進行定制生產(chǎn)。

　　Shanghai Ruizhe Environmental Protection Equipment Group Co., Ltd. has produced and sold roots vacuum pump for more than 10 years. Since its establishment in 2008, the company has discussed cooperation with a foreign enterprise for many times. And the introduction of its corresponding production technology, successfully achieved independent production! All products are clearly divided and the product parameters are detailed and complete. Some large roots vacuum pumps can be customized according to customer needs.　　

　　The main advantages of using roots vacuum pump device and how to select relevant equipment? Let’s have a brief understanding.

　　(1) Reduce power consumption: in general, the power consumed by roots vacuum pump is only 40% – 50% of the power consumed by other equipment. This kind of saving effect can be obtained because of the use of Roots vacuum pump with air-water separation device and the use of self-priming centrifugal pump.

　　Comparison example: for a vessel with a capacity of 52m3 / min and a vacuum degree of 4x104pa (absolute pressure of 6x104pa), the power comparison on the pump shaft: the liquid ring pump is 95 HP, and the tolerance of capacity and power is ± 10%. If a single-stage roots vacuum pump is used, it is 55 horsepower, with a capacity and power tolerance of ± 5%.

　　(2) Flexible operation: the capacity of the vacuum pump can be adjusted to the required value by the regulating device, and there is a minimum specific power value. The roots vacuum pump belongs to the variable capacity type, which can be specified with 25% reserve. If the required conveying capacity is not considered properly (more or less) during manufacturing, the correct treatment method is to change the diameter of the pulley and change the speed, then the ideal operation effect can be obtained.

　　Roots vacuum pump is a variable volume pump, so: ① the capacity is proportional to the speed, ② the required power is proportional to the speed and the generated pressure.

　　In all cases, roots vacuum pump can reduce the speed by 50%, and also can ensure the above advantages.

　　(3) Improvement of work quality: the vacuum degree can be obtained by a certain method, but it has nothing to do with the amount of water pumped by the pump. In the production of parchment paper plate, a liquid ring vacuum pump was installed on the vacuum couch and various vacuum degree changes were noticed, with the absolute pressure of 40-45mmhg. A separator and a Roots vacuum pump are installed on the vacuum couch, and the absolute pressure is 5mmhg with the same recording instrument.

　　(4) Self protection: once the paper machine is running, generally do not stop working. In practical work, a self-protection system is adopted, that is, two interchangeable vacuum pumps with identical specifications are used to form a two-stage vacuum pump group, which is driven by only one motor. In case one stops working, the other can work continuously. But the pipes should be laid well. At this time, the linear speed and vacuum may be slightly reduced temporarily.

　　(5) Four common basic methods are as follows: ① vacuum pump with separator; ② separation device is placed in the mesh part and wool part; ③ in order to ensure the vacuum degree of each paper machine, a central vacuum unit can be established; ④ separation device can solve the problems of high vacuum degree and low vacuum degree.

　　(6) The vacuum unit can be installed at any suitable position. Since the roots vacuum pump only draws air, it can be placed within 100m from the vacuum point at will. The only thing to be noticed is that the pressure difference (which is very small) is generated when the air passes through the pipeline. It is preferable to avoid the low pressure area in the pipe. The separate gas and water separators (column type falling separator, separator box, etc.) are all installed in a closed system with the vacuum point.

　　(7) Water immersion pump is harmless roots vacuum pump is able to withstand accidental water immersion. It can pump water out.

　　(8) There is no need to reduce the maintenance work, because: ① the separation of air and water prevents the machine from being damaged due to corrosion and wear; ② it is determined by the structure of Roots vacuum pump (because parts do not contact each other).

　　(9) Little or no water is needed. Roots vacuum pump can reduce water consumption. The liquid ring vacuum pump with a general capacity of 52m3 / min needs at least 10000l / h pure calcium free cold water in order to obtain a vacuum of 300MMHG, while roots vacuum pump can operate without water or a little water.

　　In order to obtain a higher vacuum degree, it is recommended to use two or three-stage pump combination (i.e. two or three pumps in series), and use a small amount of water to penetrate (about 400L / h).

　　The purpose of infiltrating water is: ① heat member produced by compressed air in ryushan; ② improving the volumetric efficiency of vacuum pump; ③ obtaining the minimum power.