RU198531U1 - Centrifuge - Google Patents

Abstract

The proposed technical solution belongs to the class of settling centrifuges intended for the separation of suspensions and emulsions, purification of liquids with their simultaneous disinfection and can be used in medicine, pharmacological, biochemical, agricultural, food industries and in ecological processes of purification and disinfection of waste water. the design of the centrifuge is to increase productivity. The technical result is achieved by the fact that a centrifuge containing a housing, a rotor installed inside it and a ring located inside the rotor, rigidly fixed on the upper part of the housing, and the side walls of the rotor and rings have a solid surface, an annular gap between the side walls of the rotor and the ring is constant in height, and ultraviolet lamps are fixed on the outer wall of the ring evenly in height.

Description

The proposed technical solution belongs to the class of settling centrifuges intended for the separation of suspensions and emulsions, purification of liquids with their simultaneous disinfection and can be used in medicine, pharmacological, biochemical, agricultural, food industries and in ecological processes of purification and disinfection of wastewater.

Known device for disinfection of water, containing a UV lamp and at least one streamlined with water, having an inflow and a drain vessel, in which the reaction chamber is located, and the drain of the vessel forms a free drain. The UV lamp and the vessel are jointly located in the cartridge, and the cartridge contains at least fastening means for detachable fastening to the connecting device and connecting means for supplying current and water from the connecting device [Patent No. 2507159, C02F 1/32, 2014].

The reasons that impede the achievement of a given technical result include the fact that the liquid film flows unevenly along the wall in the field of gravity. This leads to a decrease in its consumption, which means a decrease in productivity.

A device for purifying and disinfecting water is known, comprising a housing equipped with a removable cover, a filter element, an inlet fitting, a sump, an outlet pipe installed in the cover, a ring installed in the upper part of the housing, the outer surface of which is in contact with the inner surface of the housing, while on the inner surface lids are installed with ultraviolet LEDs, the sump is made in the form of a hollow hemisphere facing the center downward, the inlet fitting is installed in the center of the sump, and the sump and the inlet fitting are removable, a tube is vertically installed in the body connected to the inlet fitting, a deflector is installed on the tube, made in the form spiral, and the axis of symmetry of the deflector coincides with the axis of symmetry of the tube, in addition, a vertical slit is made in the tube with a length equal to the length of the deflector, and the upper edge of the slot is located at the level of the upper edge of the deflector, a round plate is installed on the deflector, on the lower surface of the cr There are ledges installed, the filter element is installed between the ring and the ledges, and a differential pressure gauge is installed on the body, connected to the inner cavity of the body above the upper and lower surfaces of the filtering element [Patent No. 144626, C02F 1/32, 2014].

The reasons that impede the achievement of a given technical result include the lack of combination of centrifugal force and ultraviolet cleaning. This leads to low productivity for disinfection in the field of gravity forces.

The closest technical solution in terms of a set of features to the claimed object and taken as a prototype is a filter centrifuge containing a housing, a rotor installed inside it, and a ring placed inside the rotor, while the ring is rigidly fixed on the upper part of the housing and has a uniformly perforated side surface, and the ratio the radius of the ring to the radius of the rotor is constant in height [Patent No. 88292, B04B 3/00, 2009].

The reasons that impede the achievement of the specified technical result include the low productivity of water disinfection, since the pathogenic flora practically remains unchanged in the filtrate.

The technical result of the proposed centrifuge design is to increase productivity.

The delivered technical result is achieved by the fact that a centrifuge containing a housing, a rotor installed inside it and a ring located inside the rotor, rigidly fixed on the upper part of the housing, and the side walls of the rotor and rings have a solid surface, the annular gap between the side walls of the rotor and the ring is constant in height , and on the outer wall of the ring, ultraviolet lamps are fixed uniformly in height.

Fixing the ultraviolet lamps evenly along the height on the outer wall of the ring allows more evenly disinfecting the centrate with all ultraviolet paws, which leads to an increase in the degree of disinfection and the productivity of the centrate.

The implementation of the annular gap between the side wall of the rotor and the ring with a constant value in height makes it possible to create the same intensity radiation from ultraviolet lamps along the height along the inner side surface of the rotor, which leads to the equality of liquid disinfection with the same load on the rotor wall, prevents its dynamic imbalance, reduces time for stopping, repair and maintenance of centrifuge units, which means that it increases its productivity.

The solid side surface of the side walls of the rotor and the ring ensures the same residence time of the liquid inside the rotor, more than the disinfection time. Therefore, the outgoing liquid purified from dispersed particles through the upper part of the rotor will be completely disinfected. This also contributes to the high performance of the centrifuge.

The drawing shows a schematic diagram of the proposed centrifuge design.

The centrifuge consists of a stationary housing 1 for receiving the centrifuge, inside of which a conical rotor 3 is installed on the shaft 2. Inside the rotor 3 there is a pipe 4 for supplying the suspension. Also inside the rotor 3, axisymmetrically with it there is a ring 5. Ring 5 is rigidly fixed on the upper part of the housing 1 by posts 6. In the upper part of the rotor 3 and ring 5, annular reflectors 7 and 8 are hermetically installed on the inside to prevent the overflow of unfiltered liquid from the rotor 3 and rings 5, while the annular gap between the side wall of the rotor 3 and the ring 5 is constant in height, and on the outer wall of the ring 5, ultraviolet lamps 9 are fixed uniformly in height, connected to a power source (not shown). To drain the centrate from the body 1, a branch pipe 10 is installed in its bottom.

The centrifuge works as follows.

When the shaft 2 rotates with an angular velocity ω, the rotor 3 rotates with it. The initial suspension is fed through the pipe 4, which, under the action of centrifugal force, rises along the rotating wall of the rotor 3, forming a liquid layer in the gap between the rotor wall 3 and the ring wall 5. Liquid, located in the gap between the rotating wall of the rotor 3 and the wall of the ring 5, is disinfected under the action of ultraviolet lamps 9. The cleaned centrifuge is removed from the centrifuge body 1 through the pipe 10.

Calculation example.

Irradiation dose of an ultraviolet lamp, D = 16 mJ / cm ² .

Minimum radiation intensity, E = 6 mW / cm ² .

[MU 2.1.4.719-98 Sanitary supervision of the use of ultraviolet radiation in the technology of drinking water preparation].

Average residence time of water in the disinfection chamber:

$${\tau }_{\mathrm{about}b}=\frac{D}{E}=\frac{\mathrm{sixteen}}{6}\approx 3\mathrm{from}$$

Centrifuge productivity, Q = 0.0058 m ³ / s = 5.8 l / s.

The radius of the centrifuge rotor, R = 0.5 m.

Centrifuge rotor height, H = 1 m.

, (1)

where δ is the thickness of the liquid layer;

τ _CR is the average residence time of water in the centrifuge.

.Subject to disinfection: $${\tau }_{PR}\ge {\tau }_{\mathrm{about}b}=3c$$

.

.From formula (1): $$\delta =\frac{Q\cdot {\tau }_{PR}}{2\pi \cdot R\cdot H}=\frac{0.0058\cdot 3}{2\cdot 3.14\cdot 0.5\cdot 1}=0.0055m=5.5mm$$

.

.For water purified in a centrifuge, this film thickness is ensured at the speed of the rotor $$\omega =\mathrm{ten}R\mathrm{and}d/\mathrm{from}\approx 96\mathrm{about}b/m\mathrm{and}n$$

.

Thus, the fixing of ultraviolet lamps 9 on the outer wall of the ring 5 allows, simultaneously with the separation of the dispersed phase, to effectively disinfect the suspension, which leads to an increase in the quality of the purified centrate and the productivity of the centrate. The implementation of the annular gap between the side wall of the rotor 3 and the ring 5 with a constant value in height allows you to create the same luminous flux from ultraviolet lamps 9 in any section of the rotor height, which leads to the equality of liquid disinfection and the same load on the wall of the rotor 3, prevents its dynamic imbalance , reduces the time for stopping, repair and maintenance of centrifuge units, and therefore increases its productivity.

Claims (1)

A centrifuge containing a housing, a rotor installed inside it and a ring located inside the rotor, rigidly fixed on the upper part of the housing, characterized in that the side walls of the rotor and rings have a solid surface, while the annular gap between the side walls of the rotor and the ring is constant in height, and on the outer wall of the ring, ultraviolet lamps are fixed uniformly in height.

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