HYDROCYCLONE ASSEMBLY

Abstract: A hydrocyclone assembly comprises at least one hydrocyclone (1) having at least two through flow members (2, 3) for distribution of liquid between the outside and the interior of the hydrocyclone, and circular cylindrical pipes (4, 5) of the same number as that of the through flow members of the hydrocyclone, the through flow members of the hydrocyclone being connected to the pipes, respectively. According to the invention each through flow member (2, 3) defines an annular end portion (6), which extends around a radial bore (7) in its associated pipe (4, 5) and abuts sealingly against the mantle surface of the pipe via a gasket (8) extending around said bore in the pipe.

Description: Hydrocyclone Assembly The present invention relates to a hydrocyclone assembly comprising at least one hydrocyclone having at least two through flow members for distribution of liquid between the outside and the interior of the hydrocyclone, and circular cylindrical pipes of the same number as that of the through flow members of the hydrocyclone. The through flow members of the hydrocyclone are connected to the pipes, respectively. In known hydrocyclone plants including hydrocyclone assemblies of this kind the through flow members of the hydrocyclones are connected to the circular cylindrical pipes via connection pieces on these. Since there are often hundreds of hydrocyclones in one and the same hydrocyclone plant the fabrication of the connection pieces on the circular cylindrical pipes is relatively costly, among other things because the pipes usually are made of stainless steel. Thus, the connection pieces have to be attached to the pipes by welding. The object of the present invention is to reduce the cost for connection of the through flow members of the hydrocyclones to the circular cylindrical pipes in the hydrocyclone assemblies. This object is obtained by means of a hydrocyclone assembly of the kind initially stated, which mainly is characterized in that each through flow member defines an annular end portion, which extends around a radial bore in its associated pipe and abuts sealingly against the mantle surface of the pipe via a gasket extending around said bore in the pipe. The need for arranging connection pieces on the pipes is eliminated, which reduces the cost for the fabrication of the new hydrocyclone assembly as compared to known hydrocyclone assemblies. According to a preferred embodiment of the hydrocyclone assembly according to the invention the through flow members of the hydrocyclone comprises an inlet through flow member for a liquid mixture to be separated, and an outlet through flow member for a created liquid frac¬ tion. Further, the circular cylindrical pipes comprise a supply pipe for supplying said liquid mixture to the hydrocyclone, and a discharge pipe for discharging said created liquid fraction from the hydrocyclone. The end portion of the inlet through flow member extends around a radial bore in the supply pipe and abuts sealingly against the mantle surface of the supply pipe via a gasket extending around said bore in the supply pipe, and the end portion of the outlet through flow member extends around a radial bore in the discharge pipe and abuts sealingly against the mantle surface of the dis¬ charge pipe via a gasket extending around said bore in the discharge pipe. The invention is explained more closely in the following with reference to the accompanying drawing, in which figure 1 shows a view of a hydrocyclone assembly according to the invention, figure 2 shows in part another view of the hydrocyclone assembly according to figure 1, and figure 3 shows in part a section through a detail of the hydrocyclone assembly according to the invention. The hydrocyclone assembly shown in figures 1 and 2 comprises eight hydrocyclones 1, which are arranged in parallel in two rows, each row having four hydro¬ cyclones 1. Each hydrocyclone 1 has an inlet member 2 for a liquid mixture to be separated, and an outlet member 3 for a created accept fraction. (Each hydrocyclone also has an outlet member for a created reject fraction, which is not shown in the drawing). All of the eight hydro¬ cyclones 1 have their inlet members connected to a circular cylindrical pipe 4 for supplying said liquid mixture, and their outlet members 3 connected to a circular cylindrical pipe 5, for discharging the accept fractions from the hydrocyclones 1. The pipes 4 and 5 are arranged in parallel. The hydrocyclones 1 are made of plastic material, whereas the pipes 4 and 5 are made of stainless steel. Each inlet member 2 defines an annular end portion 6 extending around a radial bore 7 in the pipe 4 and abutting sealingly against the mantle surface of the pipe 4 via a gasket 8, which extends around the bore 7 (figure 3). Correspondingly, an annular end portion of each outlet member 3 extends around a radial bore in the pipe 5 and abuts sealingly against the mantle surface of the pipe 5 via a gasket. The eight hydrocyclones 1 are clamped in pairs against the pipes 4 and 5 by attachment means in the form of arms 9 and clamping bars 10. Each clamping bar 10 is made of steel and is welded to any of the pipes 4, 5. The fabrication of the pipes 4 and 5 will be simple since only four boring operations per pipe are required to create eight radial passages through each pipe for connection of eight inlet or outlet members.

Claims: Claims 1. A hydrocyclone assembly comprising at least one hydrocyclone (1) having at least two through flow members (3) -for distribution of liquid between the outside and the interior of the hydrocyclone, and circular cylindrical pipes (4, 5) of the same number as that of the through flow members of the hydrocyclone, the through flow members of the hydrocyclone being connected to the pipes, respectively, c h a r a c ¬ t e r i z e d i n that each through flow member (2, 3) defines an annular end portion (6), which extends around a radial bore (7) in its associated pipe (4, 5) and abuts sealingly against the mantle surface of the pipe via a gasket (8) extending around said bore in the pipe. 2. A hydrocyclone assembly according to claim 1, in which the through flow members of the hydrocyclone comprise an inlet through flow member (2) for a liquid mixture to be separated, and an outlet through flow member (3) for a created liquid fraction, and in which the circular cylindrical pipes comprise a supply pipe (4) for supplying said liquid mixture to the hydro- cyclone, and a discharge pipe (5) for discharging said created liquid fraction from the hydrocyclone, c h a ¬ r a c t e r i z e d i n that the end portion (6) of the inlet through flow member (2) extends around a radial bore (7) in the supply pipe (4) and abuts sealingly against the mantle surface of the supply pipe via a gasket (8) extending around said bore in the supply pipe, and that the end portion of the outlet through flow member (3) extends around a radial bore in the discharge pipe ( 5) and abuts sealingly against the mantle surface of the discharge pipe via a gasket extending around said bore in the discharge pipe (5).

Inventors: ANDERSSON ROINE, ANDERSSON, ROINE
Applicants: CELLECO HEDEMORA AB
Application year: 1991
Main classification: B04C5
IPC codes: B04C5, D21D5