Device for dissolution of gases in water medium

FIELD: paper industry.

SUBSTANCE: device comprises hollow cylindrical body with tightly attached bottom and cover. Body contains at least two porous elements, which are equipped with facilities for fixation to body, cover plug, facilities of tangential supply of liquid phase inside body, facilities of gas supply inside body, facilities for withdrawal of products of gas dissolution in water medium. All porous elements are equipped with facilities of tight fixation of them to each other by lateral sides and by end sides to bottom of body and cover-plug, and altogether they create tight regular volumetrical body, which creates longitudinal external and internal cavities in its internal space together with body walls, being communicated to each other only through pores of elements for separate supply of water medium and gas accordingly. Axis of internal cavity matches axis of body.

EFFECT: simplified manufacturing of device elements, unification of porous elements, simplified assembly of device and its maintenance.

4 cl, 3 dwg

 

The device refers to the technology of dissolution of various gases in the aquatic environment and can be used in the pulp and paper industry for preparation of polysulfide cooking solution by oxidation of white liquor with oxygen, when receiving sulfite cooking solutions by treating the aqueous medium containing the cooking base, sulfur dioxide, upon receipt of alkali lignin from black liquor by treatment of the latter with carbon dioxide, etc. All of these processes include the stage of dissolution of gas in the aquatic environment and the speed of this stage determines the overall speed of the process of obtaining the specified product.

Closest to the proposed device to the technical essence and the achieved result is a device for dissolving various gases or gas mixtures in an aqueous medium Pat. US No. 5049320 IPC B01F 3/04, publ. 07.09.1991, This device consists of a hollow cylindrical housing with hermetically United with them bottom and a lid, placed in the enclosure at least two porous elements, equipped with means of attaching them to the chassis, means the tangential flow of the liquid phase into the housing, means to supply gas into the housing, means withdrawal of the product dissolved gases in the water environment. One of the porous element made in the form of tubes, hermetically attached by one end to the end plates of the housing. The other end is closed by a cover or attached to the cover. The gas enters the inside of this pipe and through the pores is displayed in the aquatic environment. The other (and others when they number more than two) porous element is designed as panel fitted with hermetically attached to her nipples. These pipes pass through the housing wall to the outside and are fed with gas in the panel and for fastening the panel to the chassis.

This device has a high rate of gas dissolution in aqueous medium and high consistency of product gas-liquid mixture. However, the device also has serious disadvantages. This is the high complexity of the manufacturing of the panels, and the entire apparatus as a whole, the complexity of prevention, repair, dismantling the device.

The technical use of the present invention is to simplify the manufacture of all elements of the device, the unification of the porous elements, simplifying Assembly of the apparatus and its maintenance.

This result is achieved in that the device for dissolving gases in the aquatic environment, consisting of a hollow cylindrical body with a sealed United with him by a bottom and a lid, placed in the enclosure at least two porous elements, equipped with means of attaching them to the chassis, caps, plugs, tools, tangential flow of the liquid phase within the housing, means to supply gas into the housing, means withdrawal of the product gas dissolution in the aqueous environment, according to the invention all porous items provided with means sealing the sides of one another and mechanical parties to the bottom of the case and the cover-the cover and in Assembly form a sealed properly surround the body, creating with the walls of the casing in its inner space of longitudinal interconnected solely through the pores of the elements of the external and internal cavity for separate filing them accordingly aquatic environment and gas, and the axis of the internal cavity, i.e. the volume of the body coincides with the axis of the housing. Solid body can be a right prism with a number of sides at least five or straight cylinder, composed of two or three porous elements. The device may also be provided with a means of tangential feed independent of the additional flow of water environment at several points along the length of the body.

Figure 1 shows a General diagram of the device, figure 2 is a sectional view along the line a-a of the device, which surround the body, composed of five flat porous elements - panels, has the form of a right prism with a number of sides five, figure 3 is a sectional view of the device in which the solid body has the form of a straight cylinder, composed of three p is rotimi elements. Indicate the following: 1 - body, 2 - bottom, 3 - cover 4 - porous items, 5 - connection of the sides of the porous elements together, 6 - cap-plug, 7 - tool tangential feed water environment, 8 - means of gas or gases, 9 - tool output product gas dissolution in water, 10 - means for supplying additional flow of the water environment, 11 - external cavity to the water environment 12 - the inner cavity to the gas phase, 13 - fastening porous elements to the bottom of the case 14 - flange securing the case to the bottom.

Figure 3 mounting the porous elements to the bottom of the case are not shown.

On the figures the proportionality of the scale of the installation details are not met.

Installing collected as follows. Standard porous elements, provided with means for fastening one to the other, to the bottom and cover the door, collect the solid body. The means of attachment is a flat shelf on the side and end sides, with holes for sealing through the strip, for example, using bolts. Actually porous element is a porous material of a given shape, is placed over the strip between the two perforated plates of a given shape. Surround the body through the gasket fits tightly to the bottom of the device. The bottom of the surround body fastened to the flanges of the housing. Install the cover device is and. At the place fixed piping, sensors, and emergency shut-off valves, etc. (not shown).

The device operates as follows. In the cavity 11 at a selected pressure tangentially fed through the pipe 7 to an aqueous medium containing, for example, the necessary components at a given concentration. Simultaneously into the cavity 12 through the pipe 8 serves gas or a gaseous mixture of a given composition under pressure by 0.02-0.06 MPa higher than the pressure of the water environment in the adjacent cavity. This pressure difference is the driving force for gas filtration through the pores of the elements 4 of the cavity 12 in the cavity 11. The greater the differential pressure, the higher the arrival rate of the gas in the aquatic environment. The higher the pressure of the water environment and, accordingly, the higher the pressure of the gas phase, the greater the solubility of the gas in the aquatic environment. The tangential flow of the water environment with a high speed stream provides rapid dissolution in the aqueous system of the gas flowing through the porous elements in the form of tiny bubbles. And if the process of dissolution of the gas or mixture of gases is accompanied by the expenditure of his or target component gas mixture in a chemical reaction, the higher is ultimately a total speed of the process of obtaining the specified product in the form of its aqueous solution or dispersion, for example alkali lignin.

Supply additional flow through the tool 10 COI is lsout to enhance the rotational movement of the water flow, and for introduction directly into the reaction zone additional substances, which serve in advance in the aquatic environment is impractical. For example, these substances can be coagulants and/or flocculants.

1. Device for dissolving gases in the aquatic environment, consisting of a hollow cylindrical housing with hermetically United with him by a bottom and a lid, placed in the enclosure at least two porous elements, equipped with means of attaching them to the chassis, caps, plugs, tools, tangential flow of the liquid phase into the housing, means to supply gas into the housing, means withdrawal of the product gas dissolution in aqueous medium, characterized in that all porous items provided with means sealing the sides of one another and mechanical parties to the bottom of the case and the cover-the cover and in Assembly form a sealed properly surround the body, creating with the walls of the casing in its inner space of longitudinal interconnected solely through the pores of the elements of the external and internal cavity for separate filing them accordingly aquatic environment and gas, and the axis of the internal cavity coincides with the axis of the housing.

2. The device according to claim 1, characterized in that the solid body is a right prism with a number of sides at least five or straight cylinder, with the presentation of two or three porous elements.

3. The device according to claim 1, characterized in that it is provided with a means of tangential feed of the independent addition of flow of the water environment at several points along the length of the body.

4. The device according to claim 2, characterized in that it is provided with a means of tangential feed of the independent addition of flow of the water environment at several points along the length of the body.



 

Same patents:

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FIELD: textiles; paper.

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2 tbl, 4 ex

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FIELD: textiles; paper.

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2 tbl, 3 ex

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