| 摘要 |
FIELD: process engineering.SUBSTANCE: set of invention relates to centrifugal separator and method of control over boundary bed formed in separator chamber. Centrifugal separator comprises rotor defining separation chamber communicated with fluid mix inlet and having inner zone and radially outer zone. Note here that said zones contain separated light and heavy fluids. Said fluid form boundary bed in separation chamber. Rotor has space communicated with radially outer zone to keep separated heavy fluid. Said rotor incorporates control equipment including boundary zone level meter and device to feed adjustment fluid into said outer zone. Note here that proposed device incorporates pressure source composed of variable-rate pump to feed adjustment fluid, and adjustment fluid feed channel. One end of said channel communicates with pressure source. Another end communicates with adjustment fluid feed element. Adjustment fluid feed device allows discharging fluid from radially outer zone via the same channel used for adjustment fluid feed. Boundary bed level meter is connected with pump rate control device. Method of controlling boundary bed radial level comprises the steps whereat rotor is revolved, fluid mix is fed therein to be separated by centrifugal force in separation chamber. Note here that said centrifugal force make fluids form boundary bed inside separation chamber. Then, separated heavy fluid is fed in rotor space communicated with said radially outer zone to make heavy fluid fill it to form free surface with radial level corresponding to radial level of boundary bed in separation chamber. Thereafter, boundary bed level in separation chamber is defined. Then, adjustment fluid is fed into radially outer zone via space communicated with radially outer zone of separation chamber. Density of adjustment fluid exceeds that of said light fluid. Note here that adjustment fluid is fed into said space via adjustment fluid feed channel. Note also that adjustment fluid is fed into amount in unit time required to prevent displacement of boundary bed formed in separation chamber between separated light and heavy fluids or adjustment fluid radially outward from preset outer radial level. Then, fluid is discharged from radially outer zone of separation fluid in amount in unit time required to prevent displacement of boundary bed radially inward from preset inner radial level in feed of surplus heavy fluid.EFFECT: higher efficiency of bedding interface adjustment.10 cl, 1 dwg |
