SU837370A1 - Centrifugal separator - Google Patents

Description

The invention relates to devices for separating gas-liquid mixtures in a centrifugal field and can be used in gas cleaning plants in the chemical, petrochemical and gas industry.

Centrifugal separators are widely used in gas cleaning, as they are highly efficient.

Known separation element of the gas-liquid separator, comprising a housing and an inner pipe located coaxially relative to each other and forming an annular space. The casing has a gas-liquid mixture inlet. From above, the annular space is closed tightly by an annular lid fixed on the internal branch pipe, and from below on the branch pipe a circular plate is fixed, partially overlapping the annular space. The ring cover and the plate are perpendicular to the internal nozzle and the body fl.

Also known is a separation element of a gas-liquid separator, comprising a housing and a coaxially installed internal branch pipe of a tangential gas-liquid mixture in the housing and gas flow guides mounted on the internal branch pipe, the upper guide covering the annular space, and the bottom leaving an annular gap between the housing and the guide . The gas flow guides are set obliquely, at an angle to the inner branch pipe, not equal to 90 °, which provides a smoother introduction of a rotating gas-liquid flow 2j.

The disadvantage of these structures is that the separated gas in the annular gap again contacts the liquid and, therefore, re-moistened, which does not give

the ability to dry the gas to a residual moisture content of less than 2%,

A centrifugal separator is known, comprising a housing with a tangential inlet nozzle, a central tube with a conical reflector fixed at its lower end, forming an annular channel with the walls of the housing for diverting the solid phase, placed in the upper part of the housing with a partition wall an axial hole, and a resilient plate that is cantilevered on the body and partially covers the hole of the inlet-pipe 15

-ka D.

However, the separator provides two-stage centrifugal separation, in the first and second stages the flows are mixed in the zone below the partition wall, which creates conditions for secondary entrainment of particles from the peripheral zone and a decrease in the separation efficiency.

The purpose of the invention is to increase the efficiency of separation by preventing the entrainment of particles from the peripheral zone.

The goal is achieved by the fact that the proposed centrifugal separator ZO is equipped with a nozzle attached to the edge of the inverse cone orifice and located outside the center-foam pipe. obg) azu with its walls annular channel for removal of light 35 phase.

In addition, it is equipped with a funnel with an elongated drainage nozzle placed concentrically in the central tube, which ensures the removal of fluid from the space above the partition.

FIG. 1 shows a centrifugal separator; in fig. 2 shows section A-A in FIG. one; in fig. 3 separator with a funnel placed in an axial tube.

The separator includes a housing 1 with a tangential inlet nozzle 2, a central pipe 3 on which a conical reflector 4 is fixed, a partition 5 placed in the upper part of the housing 1 and made in the form of a reverse cone with an axial hole, to the edges of which is attached a nozzle 6 forming with the walls of the pipe 3 annular channel 7 for removal of the light phase, the funnel 8 is installed

over the partition 5, and its elongated drain pipe 9 is placed concentrically in the Central pipe 3.

The separator works as follows.

In the space bounded by the housing 1, the conical reflector 4 and the partition 5, a gas flow stream is fed through the nozzle 2. As a result of the rotational movement of the flow, the liquid droplets by centrifugal forces are dropped to the periphery of the flow and flow down in the form of a film but into the walls of the body into the collection fluid. The cleaned gas flows through the annular channel 7 into the upper part of the housing 1, which is located above the partition 5. The gas that enters along with the liquid film under the conical reflector 4 is led through the central pipe 3 to the same. In the event that a liquid in the upper part of the housing separates from the partition 5, it collects in the funnel 8 and is discharged into the liquid collection through the drain connection 9, without coming into contact with the flow of purified gas from the annular channel 7 and the central pipe 3.

By separating the gas in the pre-separator separator, the efficiency of trapping liquid particles of 98.5-99.0% is achieved with a gas velocity at the entrance to the separator 50-60 m / s and a flow resistance of 0.250.4 kg / cm.

Claims (3)

1. A centrifugal separator comprising a body with a tangential inlet nozzle, a central tube with a conical reflector fixed at its lower end forming 5 with the walls of the body an annular channel for diverting a heavy phase, and a partition mounted in the upper part of the body axial bore characterized in that. In order to increase the separation efficiency by preventing particles from the peripheral zone from escaping, it is abraded by cords attached to the edges of the reversing cone opening and placed outside the central tube, and with its walls an annular channel for draining the light phase. 2. A separator according to claim 1, characterized in that it is provided with a funnel with an elongated drainage nozzle placed concentrically in the central tube. Sources of information taken into account in the examination . Branch normal H 573-65. 8373706 Gas separators and ladders. Giproneftemash, M., 1965. 2. OST 26-02-645-72. Centrifugal gas separators are adjustable, louvered and mesh. TsKBN, Minneftekhimmash, M., 1971. 3. USSR author's certificate 528949 ,. cl. B 04 C 3/06, 1975.