Dual channel atomizer and reaction apparatus

Abstract

The utility model relates to atomization field discloses a double -channel atomizer and reaction equipment, double -channel atomizer includes the inner tube, outer tube and outer cylinder of setting from inside to outside in proper order, the liquid passage for going into liquid is formed in the inner tube, the liquid passage is provided with the flow guide rod and is around first helical flow guide piece of flow guide rod arrangement, the first gas passage for going into first gas is formed between the outer tube and the inner tube, the second helical flow guide piece is provided with in the first gas passage, the second gas passage for going into second gas is formed between the outer cylinder and the outer tube, the third helical flow guide piece is provided with in the second gas passage. Through the above technical scheme, through the atomization and shaping effect of the gas of two channels, can make liquid more evenly distribute, make liquid can be in more evenly mode distribution to reactor, avoid the material in reactor to appear partial flow, wall flow, guarantee the reaction to carry on smoothly.

Description

Technical Field

[0001] This utility model relates to the field of atomization, specifically to a dual-channel atomizer, and also to a reaction device. Background Technology

[0002] For gas-liquid two-phase reactions, a tubular reactor can be used. A solid catalyst is placed in the tubes of the tubular reactor, and the gas and liquid phases react in the tubes.

[0003] The gas and liquid phases need to be mixed uniformly. In the existing technology, a disc-type riser pipe weir-type liquid distributor is usually used. The riser pipe is equipped with an overflow hole. The gas phase flows through the pipe, and the liquid phase enters the gas pipe through the overflow hole. This type of distributor is expensive, difficult to install, and the liquid phase is very prone to forming deflection and wall flow. Utility Model Content

[0004] The purpose of this invention is to overcome the problem of uneven mixing of gas and liquid phases in the existing technology.

[0005] To achieve the above objectives, this utility model provides a dual-channel atomizer, comprising an inner tube, an outer tube, and an outer cylinder arranged sequentially from the inside out. The inner tube forms a liquid channel for introducing liquid, and a guide rod and a first spiral guide vane surrounding the guide rod are disposed within the liquid channel. A first gas channel for introducing a first gas is formed between the outer tube and the inner tube, and a second spiral guide vane is disposed within the first gas channel. A second gas channel for introducing a second gas is formed between the outer cylinder and the outer tube, and a third spiral guide vane is disposed within the second gas channel. The dual-channel atomizer can be configured such that the liquid, the first gas, and the second gas are discharged from the same end, so that the liquid is atomized by the first gas, and the atomized fluid is shaped by the second gas.

[0006] In some embodiments, the first spiral guide vane and the second spiral guide vane rotate in opposite directions.

[0007] In some embodiments, the pitch ratio of the first spiral guide vane and the second spiral guide vane is 1:1.2-1:1.5.

[0008] In some embodiments, the inner tube, the outer tube, the outer cylinder, the guide rod, the first spiral guide vane, the second spiral guide vane, and the third spiral guide vane are coaxially arranged.

[0009] In some embodiments, the first spiral guide vane is connected to the outer surface of the guide rod; the second spiral guide vane is connected to the outer surface of the inner tube; and the third spiral guide vane is connected to the outer surface of the outer tube.

[0010] In some embodiments, a gradually expanding guide tube is provided between the outer cylinder and the outer tube, the inner diameter of the gradually expanding guide tube gradually increases along the flow direction of the liquid channel, and a plurality of circumferentially spaced strip holes are provided on the gradually expanding guide tube.

[0011] On the other hand, this solution provides a reaction device, characterized in that it includes a tubular reactor and the dual-channel atomizer described in the above solution, wherein the tubular reactor is provided with a series of tubes extending in a vertical direction, and the dual-channel atomizer is connected to the top of the tubular reactor.

[0012] In some embodiments, the system further includes a raw material liquid delivery pipeline, a reaction liquid delivery pipeline, and a gas delivery pipeline. The raw material liquid delivery pipeline is connected to the liquid channel, the reaction liquid delivery pipeline is connected to the bottom of the tubular reactor, and the gas delivery pipeline is connected to the first gas channel and the second gas channel.

[0013] In some embodiments, the feed liquid delivery pipeline is used to deliver a 2-nitro-2-methyl-1-propanol-methanol solution, and the gas delivery pipeline is used to deliver hydrogen.

[0014] In some embodiments, a high-precision separator is provided on the reaction liquid delivery pipeline, and the gas delivery pipeline is connected to the gas inlet and gas outlet of the high-precision separator to recover hydrogen from the reaction liquid.

[0015] Through the above technical solution, the atomization and shaping effect of the gas in the two channels can make the liquid more evenly distributed, so that the liquid can be distributed in the reactor in a more uniform manner, avoiding material deviation and wall flow in the reactor, and ensuring the smooth progress of the reaction. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the dual-channel atomizer described in this embodiment;

[0017] Figure 2 This is a schematic diagram of the reaction equipment described in this embodiment.

[0018] Explanation of reference numerals in the attached figures

[0019] 1-Dual-channel atomizer, 2-Raw material liquid delivery pipeline, 3-Tube reactor, 4-First cooler, 5-Second cooler, 6-Gas delivery pipeline, 7-High-precision separator, 8-Raw material liquid storage tank, 9-Reaction liquid delivery pipeline, 111-Guide rod, 112-First spiral guide vane, 113-Inner tube, 114-Outer tube, 115-Second spiral guide vane, 116-Gradually expanding guide tube, 117-Outer cylinder, 118-Strip orifice, 119-Third spiral guide vane. Detailed Implementation

[0020] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0021] refer to Figure 1 As shown, this solution provides a dual-channel atomizer, which includes an inner tube 113, an outer tube 114, and an outer cylinder 117 arranged sequentially from the inside to the outside. The inner tube 113 forms a liquid channel for introducing liquid, and a guide rod 111 and a first spiral guide vane 112 arranged around the guide rod 111 are provided in the liquid channel. A first gas channel for introducing a first gas is formed between the outer tube 114 and the inner tube 113, and a second spiral guide vane 115 is provided in the first gas channel. A second gas channel for introducing a second gas is formed between the outer cylinder 117 and the outer tube 114, and a third spiral guide vane 119 is provided in the second gas channel. The dual-channel atomizer can be configured such that the liquid, the first gas, and the second gas are discharged from the same end, so that the liquid is atomized by the first gas and the atomized fluid is shaped by the second gas.

[0022] The dual-channel atomizer is roughly tubular in shape, with the liquid, the first gas, and the second gas exiting from the same end. The exit of the first gas atomizes the liquid, while the exit of the second gas shapes the atomized fluid, allowing it to flow over a wider area and improving the uniformity of the atomized droplet distribution.

[0023] The inner tube 113 forms a liquid channel into which liquid can be introduced. The guide rod 111 and the first spiral guide vane 112 therein can make the liquid flow in a spiral direction to form turbulence.

[0024] The space between the outer tube 114 and the inner tube 113 serves as a first gas channel, through which a first gas can be introduced. The second spiral guide vane 115 guides the first gas to flow in a spiral direction, thereby creating turbulence. When the first gas exits from the first gas channel, it can interact with the liquid, causing the liquid to be atomized into small droplets.

[0025] Similarly, the space between the outer cylinder 117 and the outer tube 114 serves as a second gas channel, through which a second gas can be introduced. The third spiral guide vane 119 guides the second gas to flow in a spiral direction, thereby creating turbulence. After the second gas exits from the second gas channel, it can interact with the atomizing fluid to shape the atomizing fluid, expand its range, and achieve a more uniform distribution.

[0026] The first gas and the second gas can be the same gas, or different types of gases can be selected as needed.

[0027] In this scheme, the atomization and shaping effect of the gas in two channels can make the liquid more evenly distributed, so that the liquid can be distributed in the reactor in a more uniform manner, avoiding material deviation and wall flow in the reactor, and ensuring the smooth progress of the reaction.

[0028] In some embodiments, the first spiral guide vane 112 and the second spiral guide vane 115 rotate in opposite directions. Correspondingly, the rotation direction of the discharged liquid is also opposite to that of the discharged first gas, ensuring sufficient contact between the liquid and the first gas and improving the atomization effect.

[0029] In some embodiments, the pitch ratio of the first helical guide vane 112 and the second helical guide vane 115 is 1:1.2 to 1:1.5. For example, it can be 1:1.2, 1:1.3, 1:1.4, 1:1.5, etc.

[0030] In some embodiments, the inner tube 113, the outer tube 114, the outer cylinder 117, the guide rod 111, the first spiral guide vane 112, the second spiral guide vane 115, and the third spiral guide vane 119 are coaxially arranged. The first gas channel between the inner tube 113 and the outer tube 114 is a coaxial annular channel, and the second gas channel between the outer cylinder 117 and the outer tube 114 is also a coaxial annular channel. This structure allows the liquid, the first gas, and the second gas to be more evenly distributed around the central axis.

[0031] In some embodiments, the first helical guide vane 112 is connected to the outer surface of the guide rod 111; the second helical guide vane 115 is connected to the outer surface of the inner tube 113; and the third helical guide vane 119 is connected to the outer surface of the outer tube 114. The guide rod 111 can serve as a support structure for the first helical guide vane 112. An annular space is formed between the guide rod 111 and the inner tube 113. The outer helical edge of the first helical guide vane 112 is spaced from the inner tube 113, the outer helical edge of the second helical guide vane 115 is spaced from the outer tube 114, and the outer helical edge of the third helical guide vane 119 is spaced from the outer cylinder 117. This allows each fluid to flow in its corresponding annular space and, guided by the helical guide vanes, to flow in the helical direction to form turbulence.

[0032] In some embodiments, a gradually expanding guide pipe 116 is provided between the outer cylinder 117 and the outer tube 114. The inner diameter of the gradually expanding guide pipe 116 gradually increases along the flow direction of the liquid channel, and a plurality of circumferentially spaced strip-shaped holes 118 are provided on the gradually expanding guide pipe 116. A gradually expanding annular space is formed between the gradually expanding guide pipe 116 and the outer tube 114. Gas entering the outer cylinder 117 passes through the strip-shaped holes 118 and enters the gradually expanding annular space. The flow area of ​​the gradually expanding annular space gradually increases in the overall flow direction, which can guide the second gas to diffuse outward around the central axis, thereby shaping the atomized fluid to diffuse outward around the central axis.

[0033] refer to Figure 1 As shown, the lower ends (output ends) of the inner tube 113, outer tube 114, outer cylinder 117, and gradually expanding guide tube 116 are basically flush. The upper end of the inner tube 113 is higher than the upper end of the outer tube 114, and the upper end of the outer tube 114 is higher than the upper end of the outer cylinder 117. Annular sealing end caps can be respectively installed at the upper ends of the outer tube 114 and the outer cylinder 117. The upper end of the gradually expanding guide tube 116 can be connected to the outer circumferential surface of the outer tube 114, or an annular sealing end cap can also be installed at the upper end of the gradually expanding guide tube 116. A liquid input pipe, a first gas input pipe, and a second gas input pipe can be respectively installed on the side walls of the inner tube 113, the outer tube 114, and the outer cylinder 117.

[0034] On the other hand, reference Figure 2 As shown, this solution provides a reaction apparatus, comprising a tubular reactor 3 and a dual-channel atomizer 1. The tubular reactor 3 has tubular sections extending vertically, and the dual-channel atomizer 1 is connected to the top of the tubular reactor 3. Solid catalysts or other reactants can be placed in the tubular sections. The atomized fluid input from the dual-channel atomizer 1 to the tubular reactor 3 can be more evenly distributed onto the material in the tubular sections, avoiding channeling and wall flow in the solid material. The tubular reactor 3 is provided with a heat exchange fluid inlet and a heat exchange fluid outlet, allowing the heat exchange fluid to circulate in the shell side between the tubes.

[0035] In some embodiments, the reaction apparatus further includes a raw material liquid delivery pipeline 2, a reaction liquid delivery pipeline 9, and a gas delivery pipeline 6. The raw material liquid delivery pipeline 2 is connected to the liquid channel, the reaction liquid delivery pipeline 9 is connected to the bottom of the tubular reactor 3, and the gas delivery pipeline 6 is connected to the first gas channel and the second gas channel. The raw material liquid delivery pipeline 2 is used to input the raw material liquid into the liquid channel of the dual-channel atomizer 1, and the gas delivery pipeline 6 is used to deliver gas to the first gas channel and the second gas channel respectively, so as to realize the atomization and shaping of the raw material liquid. The raw material liquid reacts in the tubular reactor, and the reaction liquid is discharged through the reaction liquid delivery pipeline 9 connected to the bottom of the tubular reactor 3.

[0036] In some embodiments, the feed liquid delivery pipeline 2 is used to deliver a 2-nitro-2-methyl-1-propanol-methanol solution, and the gas delivery pipeline 6 is used to deliver hydrogen. The reaction equipment can be used for the hydrogenation reaction of 2-nitro-2-methyl-1-propanol. After the 2-nitro-2-methyl-1-propanol-methanol solution is atomized and shaped by hydrogen, it generates 2-amino-2-methyl-1-propanol in a tube array under the action of a catalyst.

[0037] In some embodiments, a high-precision separator 7 is installed on the reaction liquid delivery pipeline 9, and the gas delivery pipeline 6 is connected to the gas inlet and gas outlet of the high-precision separator 7 to recover hydrogen from the reaction liquid. The high-precision separator 7 receives the reaction liquid and is provided with a gas inlet and gas outlet connected to the gas delivery pipeline 6. Hydrogen from a hydrogen source can be delivered to the gas delivery pipeline 6. When hydrogen flows through the high-precision separator 7, unreacted hydrogen in the reaction liquid returns to the dual-channel atomizer 1 along with the newly input hydrogen, realizing the recovery and utilization of hydrogen.

[0038] The reaction liquid delivery pipeline 9 can be equipped with a first cooler 4 and a second cooler 5. The first cooler 4 cools the reaction liquid with circulating water at a higher temperature, and the second cooler 5 further cools the reaction liquid with circulating water at a lower temperature. The high-temperature separation tank 7 has a drain port to discharge the reaction liquid therein.

[0039] A raw material liquid storage tank 8 can be installed on the raw material liquid conveying pipeline 2 to supply raw material liquid to the dual-channel atomizer 1. A feed pump is installed on the raw material liquid conveying pipeline 2 to provide conveying power.

[0040] The gas delivery pipeline 6 is equipped with a first compressor located upstream of the high-pressure separator 7 and a second compressor located downstream of the high-pressure separator 7 to compress hydrogen and increase gas pressure.

[0041] Example

[0042] Taking the preparation of 1000 kg / h 2-amino-2-methyl-1-propanol as an example, the following reaction equipment is used: the feed solution is a 20% 2-nitro-2-methyl-1-propanol-methanol solution. The atomized hydrogen flow rate is 2000 Nm. 3 / h, shaping hydrogen flow rate 5000 Nm 3 The reaction rate was 10:1 h / h, with a hydrogen-to-mass ratio of 10:1. The reaction temperature was 100℃, the pressure was 2.0 MPa, the space velocity was 1.0 h⁻¹, and the catalyst was 5% palladium on carbon (1 mm particle size). The tubular reactor was used for temperature control with circulating water, and the maximum temperature difference between the bed layers was 3℃. The product conversion rate was 99.7%, the selectivity was 96.5%, and the catalyst lifetime was over 12 months.

[0043]

[0044] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A dual channel nebulizer characterized by, The device includes an inner tube (113), an outer tube (114), and an outer cylinder (117) arranged sequentially from the inside to the outside. The inner tube (113) forms a liquid channel for introducing liquid. A guide rod (111) and a first spiral guide vane (112) arranged around the guide rod (111) are provided in the liquid channel. A first gas channel for introducing a first gas is formed between the outer tube (114) and the inner tube (113). A second spiral guide vane (115) is provided in the first gas channel. A second gas channel for introducing a second gas is formed between the outer cylinder (117) and the outer tube (114). A third spiral guide vane (119) is provided in the second gas channel. The dual-channel atomizer can be configured to discharge the liquid, the first gas, and the second gas at the same end, so that the liquid is atomized by the first gas and the atomized fluid is shaped by the second gas.

2. The dual pass atomizer of claim 1, wherein, The first spiral guide vane (112) and the second spiral guide vane (115) have opposite rotation directions.

3. The dual pass atomizer of claim 1, wherein, The pitch ratio of the first spiral guide vane (112) and the second spiral guide vane (115) is 1:1.2-1:1.

5.

4. The dual pass atomizer of claim 1, wherein, The inner tube (113), the outer tube (114), the outer cylinder (117), the guide rod (111), the first spiral guide vane (112), the second spiral guide vane (115), and the third spiral guide vane (119) are coaxially arranged.

5. The dual pass atomizer of claim 1, wherein, The first spiral guide vane (112) is connected to the outer surface of the guide rod (111); the second spiral guide vane (115) is connected to the outer surface of the inner tube (113); and the third spiral guide vane (119) is connected to the outer surface of the outer tube (114).

6. The dual pass atomizer of claim 1, wherein, A gradually expanding guide tube (116) is provided between the outer cylinder (117) and the outer tube (114). The inner diameter of the gradually expanding guide tube (116) gradually increases along the flow direction of the liquid channel. The gradually expanding guide tube (116) is provided with a plurality of circumferentially spaced strip holes (118).

7. A reaction apparatus characterized by comprising: The device includes a tubular reactor (3) and a dual-channel atomizer according to any one of claims 1-6, wherein the tubular reactor (3) is provided with a tube extending in a vertical direction, and the dual-channel atomizer is connected to the top of the tubular reactor (3).

8. The reaction apparatus according to claim 7, wherein It also includes a raw material liquid conveying pipeline (2), a reaction liquid conveying pipeline (9) and a gas conveying pipeline (6). The raw material liquid conveying pipeline (2) is connected to the liquid channel, the reaction liquid conveying pipeline (9) is connected to the bottom of the tubular reactor (3), and the gas conveying pipeline (6) is connected to the first gas channel and the second gas channel.

9. The reaction apparatus according to claim 8, characterized by The raw material liquid conveying pipeline (2) is used to convey 2-nitro-2-methyl-1-propanol-methanol solution, and the gas conveying pipeline (6) is used to convey hydrogen gas.

10. The reaction apparatus according to claim 9, wherein A high-precision tank (7) is provided on the reaction liquid delivery pipeline (9), and the gas delivery pipeline (6) is connected to the gas inlet and gas outlet of the high-precision tank (7) to recover hydrogen in the reaction liquid.

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