2BW series package unit

2BW series package unit

Summary：The water ring vacuum pumps are used widely in chemical and phamacy areas for its characteristics in the work principle and structure. Normally, the operating liquid of the water ring vacuum pumps are almost discharged out directly or drained into the big circulation pool. By this method, the water supply and discharge connection is very simply and easy to operate, so it is used commonly in the real application.

 

But to discharge the operating liquid out directly has some disadvantages as bellow while the medium pumped containing the organic solvent or poisonous substance.

　　For these above reasons, more and more chemical and pharmacy enterprises change to use the 2BW series package units.

The 2BW package unit is composed of 2BV or 2BE series liquid ring vacuum pump, seperator, heat exchanger, some pipes and valves etc.. Comparing the single liquid ring vacuum pump, the installaion is more convenient. Because the liquid ring circulates, to use the closed system can decrease the liquid consumed volume largely and reduce the environment pollution efficiently. So the advantages are more obvious when the gases pumped containing organic solvent or poisonous substance. In fact, the 2BW package unit can be used widely in many conditions.

The operating liquid of the 2BW series package unit can use various of organic solvent, such as, the water, methanol, alcohol, zylene, anilin, acetone, and transformer oil etcc..

　　

N1.2	Suction port	N2.2	Discharge port	N3.3	Operating liquid supplying port
N4.2	Overflow port	N4.6	Drain	N5.0	Inlet of cooling liquid
N6.0	Ourlet of cooling liquid
010	Vacuum pump	012	Pressure meter	013	Valve
030	Motor	060.1	Coupling	060.2	Protect cover
080	Separator	130	Heat exchanger	140	Base plate
160	Suction pipes	163	No-return valve	170	Discharge pipes
230	Level meter	242	Valve	244	Valve
246	Valve	249	Valve	260	Operating liquid pipes
280	Operating liquid pipes	360	Foundation bolts	420	Temperature meter

Flow chart of 2BW package unit
（one works and another prepares）

Firstly, the gases is pumped from the inlet flange N1.2. Secondly, the gases is compressed and mixted with much operating liquid, then the mixture passes the discharge pipes(170) and flow to the separator（080). Finnaly, the mixture is divided in the separator. The gases goes out the system from the flange N2.2.
The separator（080）is designed with level meter（230）which denoting the liquid level in it. The normal level is limited from the max. to the min(determined by the level meter's visible scope). If the level is lower, the liquid will supply through the portN3.3；if the level is higher, the liquid will discharge from the overflow port4.0. So the liquid level in the separator is sured by this method.
The discharge port N4.6 is used to drain the liquid in the separator（080）and vacuum pump（010）thoroughly.
The function of the operating liquid is to form the liquid ring in the vacuum pump. The liquid passes through the pipes（260）and the separator（080）, then flow into the exchanger（130). After cooling down, through the pipes (280), the liquid reback to the pump. During the process, the heat that produces from the gases compressed and accompanied itself is released.
The 2BW package unit is designed to make the two vacuum pumps（010） use the same one separator (080) and one exchanger（130）. （note: one pump works, another prepares）. When one pump works, the butterfly valves on the suction and discharge pipes of the other prepared pump must be shut off. In general, the unit is composed of one pump(010) and one exchanger（130).