CN212068762U

CN212068762U - Atmospheric gas-liquid reaction device

Info

Publication number: CN212068762U
Application number: CN202020755614.1U
Authority: CN
Inventors: 杨丽; 毛祖莉; 辛俊亮; 黄白飞
Original assignee: Hunan Institute of Technology
Current assignee: Hunan Institute of Technology
Priority date: 2020-05-09
Filing date: 2020-05-09
Publication date: 2020-12-04
Anticipated expiration: 2030-05-09

Abstract

Ordinary pressure gas-liquid reaction unit relates to gas-liquid phase mixing apparatus technical field, and it includes reaction vessel, lower part in the reaction vessel is equipped with the aeration ring, the bottom distribution of aeration ring has a plurality of drill way aeration holes down, one side fixed mounting of reaction vessel has the air duct, the one end of air duct stretch into in the reaction vessel and with aeration ring intercommunication, the (mixing) shaft is installed to reaction vessel's liquid phase entry, the bottom of (mixing) shaft stretches into in the reaction vessel and passes the aeration ring downwards, the bottom of (mixing) shaft is connected with stirring vane, stirring vane's diameter is greater than the diameter of aeration ring. The utility model discloses can improve the speed of gas-liquid reaction under the ordinary pressure to device simple structure, the cost of manufacture is low.

Description

Atmospheric gas-liquid reaction device

Technical Field

The utility model relates to a gas-liquid phase mixing apparatus technical field especially indicates a normal pressure gas-liquid reaction unit.

Background

The gas-liquid reactor is widely applied to the fields of chemical synthesis, environmental protection, petroleum refining and the like. Usually, chemical synthesis experiments including gas-liquid reaction are available in chemical laboratories.

In the gas-liquid reaction, since the reactants are in two phases of gas and liquid, the solubility of the gas phase in the liquid phase is often low. In order to improve the gas-liquid reaction rate, most laboratories adopt a method of increasing the pressure of a reaction system, that is, a pressure-resistant reactor is generally adopted to increase the reaction rate, but if the pressure of the reaction system is higher, the pressure-resistant requirement of the reactor is correspondingly increased, the structure of the reactor is more complex, the price of the reactor is more expensive, the equipment cost is increased, and the safety of the whole reaction process is reduced to a certain extent by the reaction system under higher pressure. Moreover, when the pressure of the reaction system is higher, the reaction conditions are difficult to control, for example, in the high-pressure reaction process, if the pressure is higher, the difficulty of adding a certain amount of catalyst, initiator or liquid phase into the reaction system intermittently or continuously is higher, and particularly, the difficulty in the process of continuously adding the catalyst, initiator or liquid phase is more obvious.

Therefore, when the pressure of the reaction system is higher, the structure of the reaction equipment is more complicated, the equipment cost is relatively higher, and the reaction conditions are more difficult to control; and when the pressure of the reaction system is lower, the conditions are easier to control, the safety coefficient of reaction equipment is higher, the equipment is simpler, the equipment cost is lower, but the gas-liquid reaction rate is lower, even the reaction stops, and the normal operation of the reaction is influenced. Therefore, the above-mentioned contradiction existing in the gas-liquid reaction system is a problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a normal pressure gas-liquid reaction unit to improve the speed of gas-liquid reaction under the ordinary pressure, and install simple structure, the cost of manufacture is low.

In order to solve the technical problem, the utility model discloses a following technical scheme: the utility model provides a normal pressure gas-liquid reaction unit, includes reaction vessel, lower part in the reaction vessel is equipped with the aeration ring, the bottom distribution of aeration ring has a plurality of drill way aeration holes down, one side fixed mounting of reaction vessel has the air duct that is used for letting in the gaseous phase, the one end of air duct stretch into in the reaction vessel and with aeration ring intercommunication, the (mixing) shaft is installed to reaction vessel's liquid phase entry, the bottom of (mixing) shaft stretches into in the reaction vessel and passes the aeration ring downwards, the bottom of (mixing) shaft is connected with stirring vane, stirring vane's diameter is greater than the diameter of aeration ring.

Preferably, the reaction vessel is a three-port round bottom reaction bottle, a perforation rubber plug is arranged at a middle bottle opening of the three-port round bottom reaction bottle, and the stirring shaft penetrates through the perforation rubber plug.

More preferably, a first fixed connecting piece is connected between the middle part of the air duct and the bottle body of the three-mouth round-bottom reaction bottle, and a second fixed connecting piece is connected between the upper part of the air duct and the side bottle mouth of the three-mouth round-bottom reaction bottle.

More preferably, the distance between the stirring blade and the bottom of the reaction vessel is h1, wherein 1mm < h1 < 20 mm.

More preferably, the distance between the aeration ring and the bottom of the reaction vessel is H2 and the height of the reaction vessel is H, wherein H2 is less than H/2.

More preferably, the distance between the aeration ring and the stirring blade is h3, wherein 0mm < h3 < 15 mm.

The utility model discloses a theory of operation is: add liquid phase reaction liquid into reaction vessel, make the top of (mixing) shaft connect mechanical stirring equipment, then pass through outside hose with the gas-guide pipe connection with the gaseous phase, can open the gas phase valve after that, gas can enter into the aeration intra-annular through the gas-guide pipe, again from the aeration hole enter into reaction vessel's liquid phase, start mechanical stirring equipment and make stirring vane carry out high-speed rotation, stirring effect through stirring vane lets the gaseous phase mix with the form and the liquid phase of microbubble, but greatly increased gas-liquid reaction's contact surface, improve gas-liquid reaction's speed, and then shorten reaction time. The device can work under normal pressure without pressurization, and has the advantages of simple integral structure and low manufacturing cost.

Drawings

Fig. 1 is a schematic overall structure diagram in an embodiment of the present invention;

fig. 2 is a schematic bottom view of the device in the example.

The reference signs are:

1-reaction vessel 2-aeration ring 2 a-aeration hole

3-gas guide tube 4-rubber plug 5-stirring shaft

6-stirring blade 7 a-first fixed connecting piece

7 b-second fixed connection.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

It should be noted that, in the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, in the present disclosure, unless explicitly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature. The terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1-2, the atmospheric pressure gas-liquid reaction apparatus comprises a reaction vessel 1, an aeration ring 2 is arranged at the lower part in the reaction vessel 1, a plurality of aeration holes 2a with downward orifices are distributed at the bottom of the aeration ring 2, a gas guide tube 3 for introducing gas phase is fixedly installed at one side of the reaction vessel 1, one end of the gas guide tube 3 extends into the reaction vessel 1 and is communicated with the aeration ring 2, a stirring shaft 5 is installed at a liquid phase inlet of the reaction vessel 1, the bottom end of the stirring shaft 5 extends into the reaction vessel 1 and downwardly passes through the aeration ring 2, the bottom end of the stirring shaft 5 is connected with a stirring blade 6, and the diameter of the stirring blade 6 is larger than that of the aeration ring 2.

When the normal pressure gas-liquid reaction device provided by the above embodiment works, firstly, the liquid phase reaction liquid is added into the reaction vessel 1, the top end of the stirring shaft 5 is connected with a mechanical stirring device (for example, in transmission connection with a driving motor), then, the gas phase is connected with the gas guide tube 3 through an external hose, then, the gas phase valve can be opened, the gas can enter the aeration ring 2 through the gas guide tube 3, and then enter the liquid phase of the reaction vessel 1 from the aeration hole 2a, the mechanical stirring device is started to enable the stirring blade 6 to rotate at high speed, the bubbles coming out from the aeration hole 2a are cut into the form of micro bubbles under the stirring action of the stirring blade 6, the gas phase in the form of micro bubbles is mixed with the liquid phase, the contact surface of the gas-liquid reaction can be greatly increased, and because the stirring blade 6 is positioned below the aeration ring 2 and has a diameter larger than that of the aeration ring 2, the gas coming out from the aeration hole, thereby improving the gas-liquid reaction rate to a great extent and further shortening the reaction time. The device can work under normal pressure without pressurization, and has the advantages of simple integral structure and low manufacturing cost.

It should be noted that the specific structure of the stirring vane 6 in this embodiment is an independent vane structure (the stirring shaft 5 is connected to the middle portion thereof) in a diamond shape as a whole, so it should be understood by those skilled in the art that the diameter of the stirring vane 6 actually refers to the length of the independent vane, and from a bottom view, that is, as shown in fig. 2, both ends of the independent vane are beyond the range enclosed by the aeration ring 2, and the structure is simple and low in manufacturing cost, which is consistent with the low cost feature of this embodiment, of course, the structure of the stirring vane 6 in this application is not limited to the structure in this embodiment, and the structure may be that three or more than three vanes are connected at one end and adjacent vanes are spaced at a uniform angle.

As the material and size specification of the reaction vessel 1 of the device are not specifically limited by the application, the reaction vessel 1 can be set into a split structure which can be assembled on site when the gas guide tube 3 and the aeration ring 2 are installed, and the reaction vessel 1 can be assembled and combined after the gas guide tube 3 and the aeration ring 2 are installed. Of course, in this embodiment, as a preferred mode, also can be for the laboratory purpose, choose reaction vessel 1 for use as three-mouth round bottom reaction bottle, reaction vessel 1 is three-mouth round bottom reaction bottle, and the middle bottleneck of three-mouth round bottom reaction bottle is equipped with perforation rubber buffer 4, and perforation rubber buffer 4 is worn to locate by (mixing) shaft 5.

More preferably, a first fixing connector 7a is connected between the middle part of the air duct 3 and the body of the three-mouth round-bottom reaction bottle, and a second fixing connector 7b is connected between the upper part of the air duct 3 and the side mouth of the three-mouth round-bottom reaction bottle, so that the air duct 3 has a better firmness degree by arranging the two connectors.

In addition, in the present embodiment, as more preferable, the distance between the stirring blade 6 and the bottom of the reaction vessel 1 is h1, wherein 1mm < h1 < 20 mm; the distance between the aeration ring 2 and the bottom of the reaction vessel 1 is H2, the height of the reaction vessel 1 is H, wherein H2 is less than H/2; the distance between the aeration ring 2 and the stirring blade 6 is h3, wherein, 0mm < h3 < 15 mm.

The above-mentioned embodiment is the utility model discloses the implementation scheme of preferred, in addition, the utility model discloses can also realize by other modes, any obvious replacement is all within the protection scope of the utility model under the prerequisite that does not deviate from this technical scheme design.

In order to make it easier for those skilled in the art to understand the improvement of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and in order to clarify, some other elements have been omitted from this document, those skilled in the art should recognize that these omitted elements may also constitute the content of the present invention.

Claims

1. Ordinary pressure gas-liquid reaction unit, including reaction vessel (1), its characterized in that: lower part in reaction vessel (1) is equipped with aeration ring (2), the bottom distribution of aeration ring (2) has a plurality of drill way aeration holes (2 a) down, one side fixed mounting of reaction vessel (1) has air duct (3) that are used for letting in the gaseous phase, the one end of air duct (3) stretch into in reaction vessel (1) and communicate with aeration ring (2), (mixing) shaft (5) are installed to the liquid phase entry of reaction vessel (1), the bottom of (mixing) shaft (5) stretches into in reaction vessel (1) and pass aeration ring (2) downwards, the bottom of (mixing) shaft (5) is connected with stirring vane (6), the diameter of stirring vane (6) is greater than the diameter of aeration ring (2).

2. The atmospheric-pressure gas-liquid reaction device according to claim 1, characterized in that: the reaction container (1) is a three-opening round bottom reaction bottle, a perforation rubber plug (4) is arranged at the middle bottle opening of the three-opening round bottom reaction bottle, and the stirring shaft (5) penetrates through the perforation rubber plug (4).

3. The atmospheric-pressure gas-liquid reaction device according to claim 2, characterized in that: and a first fixed connecting piece (7 a) is connected between the middle part of the air duct (3) and the bottle body of the three-mouth round-bottom reaction bottle, and a second fixed connecting piece (7 b) is connected between the upper part of the air duct (3) and the side bottle mouth of the three-mouth round-bottom reaction bottle.

4. The atmospheric-pressure gas-liquid reaction device according to claim 3, characterized in that: the distance between the stirring blade (6) and the bottom of the reaction vessel (1) is h1, wherein the distance between h1 and h 20mm is more than 1 mm.

5. The atmospheric-pressure gas-liquid reaction device according to claim 4, characterized in that: the distance between the aeration ring (2) and the bottom of the reaction vessel (1) is H2, the height of the reaction vessel (1) is H, wherein H2 is less than H/2.

6. The atmospheric-pressure gas-liquid reaction device according to claim 5, characterized in that: the distance between the aeration ring (2) and the stirring blade (6) is h3, wherein the distance between h3 and 15mm is more than 0 mm.