SU879195A2 - Vortex pipe - Google Patents

Description

(54) VORTEX PIPE

The invention relates to the field of gas purification and can be used to purify process gases with excess pressure, in particular in a dry blast furnace gas cleaning with simultaneous utilization of part of the potential energy of gases.

Of these, a vortex energy separator is known for separating gas into cold and hot streams, evolving dust from the gas, which is collected in the dust receiver 1.

However, in this power separator dust cleaning is not effective enough.

According to the main author. St. No. 785611 is also known for the construction of a vortex tube with an annular dust-receiving bunker and an overflow gas pipeline to improve the separation process of the aerosol from the carrier medium 2.

A distinctive feature of this pipe is the presence of a bypass nozzle connecting the annular aerosol receiver to the snail inlet area, which significantly increases the degree of separation of the dispersed phase from the carrier medium.

However, this design of the vortex tube with an annular receiver aerosol as a dust separator does not work efficiently enough. This is explained by the fact.

that the aerosol particles in the peripheral vortex zone undergo the action of aerosol l-urulent diffusion forces due to the appearance of a concentration gradient at the walls due to aerosol slip, as well as additional hydrodynamic resistance. At high flow velocities, these forces contribute to the displacement of the aerosol to the paraxial region as the flow progresses and the choke of the energy separator and decrease in the values of the tangential velocity component.

The purpose of the invention is to increase the degree of bullet trapping by blocking the movement of particles from the peripheral zone to the axial region.

To achieve this goal, the pipe further comprises a louvered grille mounted for rotation in the chamber of an energy separation between the cochlea inlet and the separation nipple, the pipeline

25 soy is the most powerful dust-receiving bunker with a snail inlet zone, equipped with a shut-off regulator.

FIG. 1 schematically shows the proposed vortex tube; in fig. 2 - time 30 cut AA in FIG. I.

The vortex tube has a cooled gas nozzle 1, a snail inlet 2, an energy separation chamber 3, an annular sludge hopper 4, a throttle valve 5, a heated gas manifold 6, a separation nozzle 7 for separating the dispersed phase, an overflow pipe 8 with a shut-off regulator valve 9 and rotatable louvre 10, installed between inlet 2 and nozzle 7.

The vortex tube works as follows.

The dust-laden gas entering the inlet opening of the snail inlet 2 swirls intensively, acquiring a circular rotation. In chamber 3, an energy separation of gas takes place due to the Ranka effect. The axial gas layers are cooled and discharged to the consumer through the nozzle 1. The heated gas moves along the periphery of the vortex chamber 3. Since the path of dust particles coincides with the moving heated gas, a separation nozzle 7 is installed on the heated gas outlet to separate the dispersant phase. To prevent the dispersed phase from escaping along with the moving stream, an overflow pipe 8 with a valve 9 is provided. Louvre 10.

The rotating louvre grating 10 blocks the movement of aerosol particles from the near-wall layer to the cryosex zone (especially at the end of the hot section of chamber 3).:;

It was experimentally noted that the forces of turbulent diffusion and hydrodynamic additional resistance in many cases of the centrifugal separation of the dispersed phase from the carrier medium do not allow a degree of dust removal of more than 98-99% even at such speeds as achieved in the vortex enartor separators. Therefore, the installation of a rotary sieve with a louver sieve, through the flaps of which the dispersed phase freely passes to the periphery and does not penetrate into the axial region of the pipe, can significantly increase its efficiency as a dust collector.

devices.

Claims (2)

1. Vortex tube on the bus. St. 785611, characterized in that, in order to increase the degree of dust collection by blocking the movement of particles from the peripheral zone to the axial area, the pipe further comprises a louvre a grid mounted for rotation in the energy separation chamber between the snail inlet and the separation nipple. 2. A pipe according to claim 1, characterized in that the pipeline connecting the dust receiving hopper to the snail entrance area is provided with a shut-off regulator. Sources of information taken into account in the examination: 1. The vortex effect and its application in engineering (materials of the II All-Union Scientific and Technical Conference), Kuybishchevsky Order of the Red Banner of Labor Aviagdaon Institute, I1M. S.P. Korolev, Kuibyshev, 1976, p. 82 2. USSR author's certificate number 785611, cl. F 25 V 9/02. 1978 / -N / x