Device for purification of the liquid mediums by flotation

FIELD: food-processing industry; devices for purification of the liquid mediums by flotation.

SUBSTANCE: the invention is pertaining to the field of food-processing industry for purification of the liquid mediums from the suspended particles, greases and other impurities. The device includes the inlet of the subjected to purification liquid(1), the inlet of the gas (2), the flotator (5) with the chute for the froth removal (6), the hazemeter (10) and the withdrawal of the purified liquid, the set of the bubblers (7), the compression pump (4), the deaerator (8), the gas flow regulator (14) and the control unit (11), which by the signal of the hazemeter selects the corresponding bubbler, at operation of which the turbidity of the purified liquid is minimal. The outlet of the gas flow rate sensor (13) is connected to the regulator inlet, and the outlet of the compression pump is connected through the unit of control valves (12) to the unit of the bubblers. The invention ensures the increased efficiency of the liquid mediums purification by flotation and the functional reliability of the device.

EFFECT: the invention ensures the increase of efficiency of the liquid mediums purification by flotation and the functional reliability of the device.

2 dwg

 

The invention relates to the field of food industry for cleaning fluids from suspended particles, grease and other contaminants and can be used for different businesses, for example, for fisheries.

A device for cleaning fluids flotation, selected as a prototype (patent RF 2166481, 02 F 1/24, G 05 D 27/00, published 10.05.2001). The device includes a flotation cell, a pump for entering the cleaned fluid ejector with a saturator, the tray for removal of the foam, mutemeri, nozzle, valve, accumulator, functional Converter, the automatic extremum, servo drive.

Device for cleaning fluids flotation has the following disadvantages:

in the device, the flow rate of the injected gas is not associated with the consumption of the input stream of the cleaned fluid, which reduces economic efficiency;

- no tank on the discharge of treated liquid, which causes the influence of the gas bubbles generated in the flotation cell, reading turbidimeter;

- the unit has low performance compared to continuous systems.

The invention solves the problem of increasing the efficiency of cleaning fluids flotation and enhance functional reliability.

The proposed solution consists in the following: a device for cleaning idca environments flotation, including the flotation machine with the tray to remove the foam, enter the cleaned liquid, gas, NIR turbidimeter installed on the discharge of treated liquid additionally contains in the flotation cell is a set of bubblers in the shape of a spiral and a different hole sizes, compressor, tank, regulator gas flow, signal flow sensors input stream of cleaned liquid and gas flow automatically sets the gas flow supplied to the bubbler for saturation of the purified liquid, a control unit, which signal turbidimeter purified liquid that is installed at the outlet of the deaerator, the switching control valves, selects the appropriate bubbler, in which the turbidity of the purified water is minimal, and the sensor output of the gas flow is connected to the input of the regulator, and the output of the compressor is installed on the gas inlet is connected via the unit control valve block bubblers. The control unit periodically switches the bubblers to prevent them from pollution.

On the accompanying graphic material shown: figure 1 is a diagram of declared facilities; figure 2 is a top view of the set of bubblers.

In the diagrams the following notation:

1 - enter the purified liquid; 2 - gas inlet; 3 - flow sensor fluid; 4 - compressor; 5 - flotator; 6 - tray to remove foam; 7 - set barbot the ditch; 8 - deaerator; 9 - discharge of treated liquid; 10 - NIR turbidimeter; 11 - the control unit; 12 - block control valve; 13 - sensor gas flow; 14 - regulator; 15 - latch.

Device for cleaning fluids flotation works as follows.

The treated fluid input 1 is fed into the flotation cell 5 at the same time from the flow sensor fluid 3 to the input of the controller 14 receives the signal, determines the flow rate of the injected gas. The controller 14 sets the required flow of gas through the sensor signals of the gas flow 13 and the liquid 3.

To the input of the control unit 11 from the turbidimeter 10 receives signals corresponding to the magnitude of the turbidity of the purified fluid. The control unit 11 through the period of time required for completion of the transition process in the flotation cell, in turn opens the control valves, the block 12, which regulate the flow of gas from the compressor 4 to the set of bubblers 7. Set of bubblers 7 includes N bubblers with different diameter holes, and the number of control valves included in the block 12, is equal to the number of bubblers. As a result of these operations is determined by the bubbler, providing a minimum turbidity of the output fluid flow.

The liquid in the flotation cell 5, is saturated with gas bubbles. The gas bubbles in contact with particles of dirt, form a flotation complexes, to the which float to the surface and a scraper (not shown) are moved in the tray to remove foam 6.

The liquid emerging from the flotation cell 5, passes through the deaerator, preventing the influence of gas bubbles on the testimony of the turbidimeter.

Device for cleaning fluids flotation, including the input of the purified liquid, the flotation machine with the tray to remove the foam, NIR turbidimeter, the discharge of treated liquid, a gas, characterized in that in the flotation cell has a set of bubblers in the shape of a spiral and different sizes of holes in them, in addition, the device is equipped with a compressor mounted on the input gas, the tank connected to the output of the flotation cell, a control unit, an input connected to the output of the turbidimeter, installed at the outlet of the deaerator, and the output - control valves of the bubblers, and a compressor connected to the bubblers through the flow regulator gas associated with flow sensors cleaned liquid and gas flow.



 

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3 cl, 5 tbl, 2 ex

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23 cl, 8 dwg

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1 dwg

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1 dwg, 3 tbl

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FIELD: purification of ground water from iron, manganese, copper and other metals and simultaneously removal of hydrogen sulfide and other hazardous gases, in particular, supplying of cities, populated localities, individual objects and agricultural complexes with water.

SUBSTANCE: method involves vacuumizing and mixing water stream to be purified with air by dispersing water with air; feeding water-and-air mixture into casing containing non-immersed filtering charge; providing separate discharge of purified liquid stream and air; performing vacuumizing process by feeding liquid stream under pressure into converging tube equipped with Venturi nozzles; separating stream in converging tube and directing through Venturi nozzles; continuously ejecting air from environment and performing filtering of purified water during free flowing thereof. Mixer with air sucking apertures is positioned concentrically at the outer side of converging tube. Outer part of converging tube surface is defined by uniting side surfaces of a number of truncated cones whose bases are extending in two parallel planes, and centers of these bases are apexes of regular polygons.

EFFECT: increased efficiency in removal from water under purification process of inorganic difficult-to-oxidize substances and organic substances, and reduced number of purification steps.

3 cl, 2 dwg, 2 tbl

FIELD: method and equipment for physicochemical clarification by flotation of water saturated with material in the form of suspension.

SUBSTANCE: method involves stage of static flocculation with descending flow, said stage comprising the step of primary separation of heavier particles, with zone where primary separation of heavier particles is performed being positioned under zone, wherein static flocculation step is performed, and including removal of heavier particles, with settling velocities of heavier particles held at this stage of static flocculation/primary separation being lower or equal to settling velocities of floated particles, and flotation step, during which step light particles are removed, with settling velocity of light particles being lower than cutoff threshold of settler. It is preferable that before flocculation step, high-energy mixing step be provided, said step being combined with introduction of one or number of reactants, such as coagulant or flocculant. Apparatus for effectuating said method according to any version comprises static flocculator equipped with deflectors and cutoff devices, lamellar settler positioned directly under static flocculator, and flotation unit with high pressure-expansion system designed for generation of bubbles for flotation of lighter particles, said parts of apparatus being arranged in one and the same volume. Apparatus is further provided with one or number of mechanical flocculation cells, which are supported during mixing process and into which flocculant is injected. Cell is positioned between coagulator and static flocculator-lamellar settler.

EFFECT: provision for optimal quality of clarification with the use of flotation treatment of water containing floatable and non-floatable particles, compact construction and provision for preventing formation of bottom sediment in flotation unit.

6 cl, 5 dwg

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