RU1768267C - Rotor hydroacoustic disperser - Google Patents

Abstract

Usage: dispersion of heterogeneous working environments. SUMMARY OF THE INVENTION: In the housing 1, a rotor is installed in the form of a blade disk 7 with coaxial cylinders 2 with slots. At the ends of the cylinders, annular grooves are made 10. 11. At the rotor outlet, a centrifugal pump is installed. 14. 4 ill.

Description

FIG. 2

The invention relates to equipment for the production of mineral fertilizers by the method of hydroacoustic treatment of heterogeneous working media such as liquid-liquid, liquid-gas, liquid-solid.

The invention can be applied in chemical, pharmaceutical and other industries for dispersing, emulsifying, mixing, dissolving, homogenizing, and the like physicochemical heat and mass transfer processes.

A rotary sonar apparatus for carrying out these processes is known.

The apparatus contains a set of coaxial cylinders with slots of the stator and a rotor made in the form of a disk on which radial blades and cylinders placed between the stator cylinders are coaxially mounted.

Product processing in this apparatus takes place in radial clearances between rotating and fixed surfaces. This is not enough to intensify the process, increase productivity and product quality,

Rotary hydroacoustic dispersants are known which eliminate partially noted disadvantages - see, for example, a fluid aeration device made in accordance with a. with. USSR Ns 351789. This analog apparatus contains a housing with inlet and outlet nozzles, a perforated rotor and a stator with capillary channels for supplying gas (steam) to the working area.

The introduction of small amounts of inert gas can significantly increase the efficiency of hydrodynamic phenomena arising from the dispersion and deformation of gas bubbles. A significant effect is also exerted by the steam supply, the cavitational collapse (condensation) of the bubbles of which allows one to substantially intensify the thermal and mass transfer processes. Such apparatuses can be successfully used not only in liquid extraction, but also in the processes of fermentation, chlorination, removal of solvents from polymer solutions and DR.

However, they are not applicable where gas or steam is excluded due to the low throughput of the hydraulic path, due to technological considerations.

Therefore, it is more rational to increase the dispersion efficiency by creating an increased pressure drop across the working bodies of the rotor-stator; an increase in the number of dispersing organs of the rotor-stator; introduction of various

overflow holes in the rotor or stator, or both in the rotor and in the stator (to increase the contact surface of the phases).

By the largest number of similar assemblies and parts, scales and conditions

0 application, as well as the use of promising means of intensifying the dispersion process, a technical solution of a rotary sonar dispersant was adopted as a prototype,

5 comprising a housing with a set of coaxial cylinders with slots and a rotor made in the form of a disk with radial blades and holes, on both sides of which are mounted coaxial cylinders with slots placed between the cylinders of the housing.

When the apparatus is operating, radial blades create the necessary pressure differential across the rows of working bodies of the rotor-stator,

5 during overlapping-combining of which pressure pulsations and flows of the working medium through openings in the rotor disk occur, which improve the dispersion process.

The main disadvantage of the prototype is the lack of dispersion efficiency due to low

dispersion performance and fineness.

5 An object of the present invention is to improve the performance and dispersion quality.

The goal is achieved in that the rotary sonar dispersant,

0 containing a housing with a set of coaxial cylinders with slots and a rotor made in the form of a disk with radial blades and holes, on both sides of which are mounted coaxial cylinders 5 with slots located between the cylinders of the housing, has ring grooves on the rotor of the sides of the coaxial cylinders and additional centrifugal pump stage at the exit.

0New features increase

the number of working bodies, in particular, by sequentially arranging rotor-rotor elements from both ends of the rotor (as is known) plus annular grooves (which

5 is new), however, in one working pair, an average of 1.5-2 atmospheres of pressure is lost. Typical centrifugal pumps develop 4-6 atm. pressure. Therefore, so that all steps of the working bodies work efficiently necessary and

a sufficient number of them should be no more than 2 - 4. Our experimental data established that if the same standard centrifugal pump, developing 4-6 atm. pressure at the outlet of the rotor (and not at the inlet), then at all the rows of the working bodies there is a discharge up to 0.5 atm, and at the outlet of the pump a pressure up to 2.5 atm. This discharge (0.5 there,) is quite enough to intensify cavitation phenomena, equivalent in all effectiveness to the differential pressure drop of 1.5-2 atm. And an over-developed pressure (2.5 atm.) Is useful for implementing collapsible cavitation and transporting the working medium from the dispersant to the consumer.

A vortex flow occurs in the end annular grooves of the rotor, which is torn apart by flooded jets when the rotor-stator slots coincide and collapses with cavitation when the rotor-stator slots overlap and the pressure increases in the annular grooves.

In FIG. 1 schematically shows a rotary sonar dispersant, a longitudinal section; FIG. 2 is a section AA in FIG. 1; in FIG. 3 is a section BB in FIG. 1; in FIG. 4 is a section bb in FIG. 1.

The rotary sonar disperser consists of a housing 1, equipped with a front-mounted set of slotted coaxial cylinders 2 with an inlet pipe 3, a rear-mounted set of coaxial slotted cylinders 4, a cylindrical slotted insert 5 and a rotor 6, made in the form of a blade disk 7, on both sides of which are coaxial cylinders 16 with slots 8, 9 and annular slotted grooves 10, 11 are made. The rotor 6 may have radial blades 12. The rotor 6 is mounted on the drive shaft 13 in front of the centrifugal pump 14. equipped with an outlet pipe 15.

The working medium, for example, the suspension is fed into the inlet pipe 3. Next, the working medium is radial blades 12 and behind

the discharge created by the centrifugal pump 14 is pumped through the rear-mounted set of slotted coaxial cylinders 2, the rear-mounted set of coaxial slotted cylinders 4, through the cylindrical slotted insert 5 and the centrifugal pump 14 is discharged through the outlet pipe 15 to the consumer.

At the same time, in the annular grooves 10, 11 with alternating coincidence - overlapping of the slots 8, 9 of the rotor with the slots of the coaxial cylinders 2, 4 and insert 5, vortexes alternate.

pressure pulsations and cavitation phenomena causing fine grinding of solid components of the working medium. Moreover, the solid components are retained in the groove 11 and in the cavity of the housing 1 until complete

grinding, more precisely, to the sizes characterized by their speed of twisting in a centrifugal field.

The technical and economic efficiency of the invention consists in high productivity and good product quality. Experimental, comparative with the prototype, tests of a rotary sonar dispersant on an organic dye showed that when

productivity 7m / h, n 3000 rpm; N 7 kW fineness of dispersion less than 3 microns was achieved in 2 hours,

The prototype provided this fineness of dispersion under these conditions for 10 hours.

Claims (1)

SUMMARY OF THE INVENTION A rotary sonar dispersant comprising a housing and a rotor installed therein in the form of a blade disk with coaxial cylinders with slots installed between the coaxial cylinders of the housing, characterized in that, in order to improve the performance and dispersion quality, the rotor is equipped with an additional centrifugal pump at the outlet and in the coaxial cylinders of the blade of the blade from the ends made annular grooves. fCD CM CO CO c I J