CN214635484U - Non-premixing vortex type gas mixing device - Google Patents

Abstract

The utility model provides a non-mixes spiral-flow type gas mixing device in advance, includes gas delivery inner tube and gas delivery outer tube, and gas delivery outer tube cover is established outside the gas delivery inner tube, the one end of gas delivery outer tube is equipped with the hybrid chamber, the gas delivery inner tube is equipped with inner tube convergent section at the end that is close to the hybrid chamber, inner tube convergent section is equipped with wheel hub, wheel hub is equipped with first blade along circumference, wheel hub is equipped with the second blade towards the terminal surface of hybrid chamber, be equipped with the gas pocket on the first blade.

Description

Non-premixing vortex type gas mixing device

Technical Field

The utility model relates to a gas mixing device especially relates to a non-premixing spiral-flow type gas mixing device.

Background

The gas phase rapid mixing process is often encountered in the chemical industry and the metallurgical industry. For example: 3-chloro-2-methyl-1-propylene (chloro-isobutene) is prepared by reacting isobutene with chlorine, and the reaction of isobutene and chlorine is very rapid and is generally completed within 0.01-1 s; on the other hand, the reaction is a strongly exothermic process, the degree of mixing of isobutene with chlorine directly affects the axial and radial temperature distribution in the subsequent reactor, and poor temperature distribution leads to an increase in by-products in the reaction, resulting in a decrease in the yield of the desired product 3-chloro-2-methyl-1-propene. Therefore, in order to ensure a high yield of 3-chloro-2-methyl-1-propene, it is necessary to mix isobutylene and chlorine gas thoroughly and instantaneously. In addition, in the field of carbonylation metallurgy, two gases are required to be uniformly mixed according to a certain proportion to participate in decomposition reaction, benzene alkylation reaction, gaseous hydrocarbon oxidation reaction and the like, which all relate to a gas phase rapid mixing process, and the operation of subsequent processes can be seriously influenced by the nonuniform mixing of gas phase reactants. The gas phase rapid mixing technology plays a very important role in the chemical and metallurgical industries, so how to rapidly and uniformly mix two or more gases in a limited time and space becomes a problem to be solved urgently in the chemical production process.

To date, published reports on gas mixing devices are common, and CN205760848U discloses a multi-component gas mixing device, which is based on the principle that a plurality of layers of blades are arranged in a mixing housing, and the blades are driven to rotate by an external driving device to generate a disturbed airflow so as to mix the multi-component gas in the mixing housing; the disadvantages are that: the fan blades of the device are arranged in a mode of only accelerating the axial flow of the multi-component gas, and the generated radial diffusion is weak, so that the mixing effect is adversely affected; in addition, the device needs to be provided with an external driving device, and the disadvantage is large occupied area.

CN205613296U discloses a gas mixing device, which includes a mixing shell and an air outlet shell, wherein a mixing chamber is provided in the mixing shell, and a first gas enters the mixing chamber from an air inlet pipe at the left end of the mixing shell in a spraying manner to be mixed with a second gas.

US2013343147 discloses a mixing device comprising a central distribution chamber having a circular cross-sectional shape consisting of a first tube sheet and a second tube sheet intersecting; the first air inlet, the second air inlet and the single air outlet are communicated into the distribution chamber; the first tube plate is arranged in the second air inlet and is provided with an injection tube extending into the distribution chamber; a second tube sheet is arranged in the gas outlet and is fitted with mixing tubes in the form of tubes. The second gas flows through the injection pipe and then enters the corresponding mixing pipe, and is mixed with the first gas in the mixing pipe.

CN10472221A discloses a mix effectual gas mixing arrangement, the device be bilateral symmetry structure, and the centre is the hybrid chamber, and main gas gets into gas distribution pipe by main intake pipe, then gets into in the hybrid pipe from the gas input hole on the gas distribution pipe, takes place first mixing with sneaking into gas, and the hybrid gas passes through the throat formula honeycomb duct, and the impact flows in opposite directions in the hybrid chamber middle part, carries out the second time and mixes.

US4865820 discloses a gas mixer and distributor for a reactor provided with two chambers, a second gas inlet chamber arranged between the first gas inlet chamber and the reactor inlet, tubular or slit-like channels extending from the first chamber through the second chamber to the inlet of the reaction chamber, two streams of gas forming turbulence in these channels, causing the gases to mix.

The mixing modes of the gases in the patents CN205613296U, US2013343147, CN10472221A and CN10472221A are all cross-flow mixing, and the limitations are that: if the flow velocity of the air flow is low, the penetrating power of the fluid is insufficient, the diffusion of the main body is difficult to realize, and the mixing effect is influenced; for high flow rates of gas, excessive loss of momentum can result, causing the gas flow to slow down, resulting in extended residence times.

CN203139999U discloses a gas mixing reactor, which comprises an inner cylinder and an outer cylinder, wherein the outer cylinder is arranged outside the inner cylinder, and forms an annular cavity with the outer wall of the inner cylinder, a first gas inlet and a second gas inlet are respectively arranged above the inner cylinder and the outer cylinder, and cyclones are respectively arranged inside the inner cylinder and the outer cylinder; two gas flows respectively enter the inner cylinder body and the outer cylinder body to form rotational flows, and then form jet flows through the necking gas outlets to achieve the mixing purpose, wherein the mixing mode is jet flow mixing. As reported in foreign documents "Forney L J, Nafia N, VoH X. Optimum jet mixing in a tubular reactor [ J ]. AIChE journal, 1996, 42(11): 3113-. The device forms efflux through the gas exit end and mixes, but mixes the distance shorter, influences its mixed effect.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that, overcome the above-mentioned defect that prior art exists, provide a misce bene and mixing distance short non-mix spiral-flow type gas mixing device in advance.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a non-mixes spiral-flow type gas mixing device in advance, includes gas delivery inner tube and gas delivery outer tube, and gas delivery outer tube cover is established outside the gas delivery inner tube, the one end of gas delivery outer tube is equipped with the hybrid chamber, the gas delivery inner tube is equipped with inner tube convergent section at the end that is close to the hybrid chamber, inner tube convergent section is equipped with wheel hub, wheel hub is equipped with first blade along circumference, wheel hub is equipped with the second blade towards the terminal surface of hybrid chamber, be equipped with the gas pocket on the first blade.

Furthermore, the end face of the hub is provided with a flow guide cone, and the second blades extend outwards from the radial direction of the flow guide cone.

Preferably, the cone angle of the guide cone is 35 to 65 °.

Furthermore, the included angle between second blade and the wheel hub terminal surface is crescent along the extending direction of blade, the direction that the topside of second blade to the vertical height of wheel hub terminal surface extended along the second blade reduces gradually, forms the guiding gutter between the adjacent second blade.

Further, the length of the gas conveying outer pipe is 3-6 times of the diameter of the gas conveying outer pipe, and the diameter ratio of the gas conveying outer pipe to the gas conveying inner pipe is 1.5-2.

Further, the gas conveying inner pipe is welded on the inner wall of the gas conveying outer pipe through a support.

Further, the rotating included angle of the first blade is 30-45 degrees.

Furthermore, a plurality of air holes are formed in the first blade, and the diameter of each air hole is 2-8 mm.

Preferably, the first blade is a hollow blade, the number of the air holes of each blade is 80-100, the number of the open holes is different, and the aperture of the air holes is uniform or non-uniform.

Further, the second blade is a curved rib-like structure.

The beneficial effects of the utility model reside in that: the two gases are conveyed through the concentric circular tubes without premixing, and the two gases can be mutually temperature-regulated; one gas reaches the hub through the gas conveying inner pipe, is radially diffused to the inside of the first blade and then flows out of the gas holes in the first blade; the other gas is conveyed to the first blade from an annular gap between the gas conveying inner pipe and the gas conveying outer pipe and drives the first blade to rotate; the special structural design enables the two gases to form equidirectional rotational flow, and the two gases are spirally sucked forwards and mutually; the two gases are uniformly mixed in a short time at a low scale, and the mixing distance is effectively shortened.

Drawings

Fig. 1 is a perspective view of a three-dimensional structure of an embodiment of the present invention;

fig. 2 is a right side view of an embodiment of the present invention;

fig. 3 is a perspective view of a blade according to an embodiment of the present invention.

In the figure: 1. the gas conveying device comprises a gas conveying outer pipe, 2, a gas conveying inner pipe, 3, an inner pipe support, 4, an inner pipe reducing section, 5, a hub, 6, a first blade, 7, a gas hole, 8, a second blade, 9, a flow guide cone, 10, a flow guide groove, 11 and a mixing cavity.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-2, this embodiment includes gas conveying inner tube 2 and gas conveying outer tube 1, and gas conveying outer tube 1 cover is established outside gas conveying inner tube 2, and gas conveying outer tube 1 and gas conveying inner tube 2 are coaxial pipe, the one end of gas conveying outer tube 1 is equipped with mixing chamber 11, gas conveying inner tube 2 is equipped with inner tube convergent section 4 at the end that is close to mixing chamber 11, inner tube convergent section 4 is equipped with wheel hub 5, and inner tube convergent section 4 and wheel hub 5 seamless connection of gas conveying inner tube 5, wheel hub 5 is equipped with first blade 6 along circumference, wheel hub 5 is equipped with second blade 8 towards the terminal surface of mixing chamber 11, be equipped with gas pocket 7 on the first blade 6.

The first blade 6 is a hollow blade, the number of the air holes of each blade is 80-100, and the number of the holes is different.

Chlorine is conveyed by the gas conveying inner tube 2, passes through the inner tube tapered section 4 to reach the hub 5, is radially diffused to the inside of the first blade 6 after being temporarily suspended in the hub 5, and finally flows out of the air hole 7; isobutene is conveyed to the first blade 6 through a pipeline annular gap between the gas conveying outer pipe 1 and the gas conveying inner pipe 2, and the first blade 6 is driven to rotate; the number of the first blades 6 is 5, and the rotating included angle is 45 degrees; the top surface of the hub 5 is lower than the highest point of the first blades 6; a flow guiding cone 9 is arranged at the center of the top surface of the hub 5.

The second blades 8 are of a bent rib-shaped structure and extend outwards from the flow guide cone 9 in the radial direction, the vertical height from the top edge of each second blade 8 to the top surface of the hub 5 is gradually reduced along the extending direction of the blade, and a flow guide groove 10 is formed between every two adjacent second blades 8; the contained angle between the terminal surface of second blade 8 and wheel hub 5 increases along the extending direction of second blade 8 gradually, and above-mentioned contained angle is minimum when being close to water conservancy diversion circular cone 9 promptly, and the direction contained angle that radially diverges at second blade 8 enlarges gradually, and up to wheel hub 5's top surface outermost end, this moment the contained angle is 90. Thus, the surface of the second blade 8 is formed into a twisted arc, and the beneficial effect of the design is that the airflow is subjected to less resistance in the flowing process.

As shown in fig. 3, the upward side is the top side of the second blade 8, and the upward end surface is the top surface of the hub 5.

The utility model discloses when the operation, the air current opposite direction that first blade 6 and second blade 8 produced, second blade 8 drives the air current around and moves forward, forms a low-pressure area at 8 backs of second blade, because pressure differential, isobutene after first blade 6 is rotatory supplements to this low-pressure area along guiding gutter 10 rapidly to along with the rotation of second blade 8 is along the motion forward. By the structural design, the two gases form equidirectional rotational flows, and the two gases are spirally sucked forwards and mutually; so that the two gases can be uniformly mixed in a short time at a low scale.

Various modifications and variations of the present invention may be made by those skilled in the art, and they are within the scope of the present invention provided they are within the scope of the claims and their equivalents.

What is not described in detail in the specification is prior art that is well known to those skilled in the art.

Claims (8)

1. The utility model provides a non-premix spiral-flow type gas mixing device, includes gas conveying inner tube and gas conveying outer tube, and gas conveying outer tube cover is established outside the gas conveying inner tube, its characterized in that: the one end of gas delivery outer tube is equipped with the hybrid chamber, the end that the gas delivery inner tube is being close to the hybrid chamber is equipped with inner tube convergent section, inner tube convergent section is equipped with wheel hub, wheel hub is equipped with first blade along circumference, wheel hub is equipped with the second blade towards the terminal surface of hybrid chamber, be equipped with the gas pocket on the first blade.

2. The non-premixed cyclonic gas mixing apparatus according to claim 1, wherein: the end face of the hub is provided with a flow guide cone, and the second blades extend outwards from the position of the flow guide cone in the radial direction.

3. The non-premixed cyclonic gas mixing apparatus according to claim 2, wherein: the included angle between second blade and the wheel hub terminal surface increases along the extending direction of blade gradually, the perpendicular height of the topside of second blade to wheel hub terminal surface reduces along the direction that the second blade extends gradually, forms the guiding gutter between the adjacent second blade.

4. A non-premixed cyclonic gas mixing apparatus according to any one of claims 1 to 3, wherein: the length of the gas conveying outer pipe is 3-6 times of the diameter of the gas conveying outer pipe, and the pipe diameter ratio of the gas conveying outer pipe to the gas conveying inner pipe is 1.5-2.

5. A non-premixed cyclonic gas mixing apparatus according to any one of claims 1 to 3, wherein: the gas conveying inner pipe is welded on the inner wall of the gas conveying outer pipe through a support.

6. The non-premixed cyclonic gas mixing apparatus according to claim 1, wherein: the rotating included angle of the first blade is 30-45 degrees.

7. The non-premixed cyclonic gas mixing apparatus according to claim 1, wherein: the air holes in the first blade are arranged in a plurality, and the diameter of each air hole is 2mm-8 mm.

8. A non-premixed cyclonic gas mixing apparatus according to any one of claims 1 to 3, wherein: the second blade is a curved rib-like structure.

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