Microporous gas recovery reaction device

Abstract

The utility model belongs to the technical field of microreactors, and discloses a microporous gas recovery reaction device. Comprising a reactor cylinder, the reactor barrel is provided with a plurality of gas inlet pipes, one gas inlet pipe is arranged in the center of the reactor barrel, and the other gas inlet pipes are arranged around the center circumference of the barrel; the gas inlet pipe extends into the bottom of the reactor cylinder and is provided with a bubbler; a plurality of micro-channel heat exchangers are arranged in the reactor barrel along the axial direction of the reactor barrel; the plurality of micro-channel heat exchangers are uniformly arranged around the center circumference of the reactor cylinder; the bubbler and the micro-channel heat exchanger are combined for use, so that high-efficiency purification of entering gas is realized, and the purity of the purified gas is improved.

Description

Technical Field

[0001] This utility model belongs to the field of chemical production technology and relates to a microreactor, specifically a microporous gas recovery reaction device. Background Technology

[0002] A microreactor is a device that carries out chemical reactions at a microscale, typically consisting of microchannels, mixers, separators, and control units. With the continuous advancement of microfabrication and microfluidics technologies, microreactors have gradually become a research hotspot in fields such as chemical synthesis, biomedicine, and materials science. Their characteristics include miniaturization, continuous operation, efficient mixing, rapid heat and mass transfer, and precise control, promoting intrinsic safety.

[0003] Microchannel heat exchangers are often used in some gas recovery devices for heat exchange and gas purification. However, the existing gas inlet structure is not compatible with the high-efficiency heat exchange structure and performance of microchannel heat exchangers, which results in the heat exchange efficiency of microchannel heat exchangers not being fully utilized, thus affecting the efficiency and degree of gas purification. Utility Model Content

[0004] This invention overcomes the shortcomings of the prior art by proposing a microporous gas recovery reaction device to improve gas recovery efficiency.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A microporous gas recovery reactor includes a reactor body; multiple gas inlet pipes are arranged along the axial direction of the reactor body, with one gas inlet pipe located at the center of the reactor body and the remaining gas inlet pipes evenly arranged around the central circumference of the reactor body; the bottom of each gas inlet pipe extends to the bottom of the reactor body and is equipped with a bubbler; multiple microchannel heat exchangers are arranged along the axial direction of the reactor body; the multiple microchannel heat exchangers are evenly arranged around the central circumference of the reactor body and are located inside the evenly arranged gas inlet pipes; the reactor body is provided with a purified gas outlet and a washing liquid inlet.

[0007] Furthermore, a support plate is provided inside the reactor cylinder, and the gas inlet pipe is connected and fixed to the support plate.

[0008] Furthermore, the central gas inlet pipe is connected to the gas inlet pipes evenly distributed around the central circumference, and the central gas inlet pipe is connected to the second gas inlet located at the top of the reactor cylinder.

[0009] Furthermore, the microchannel heat exchanger includes a heat exchange tube body, which is closed at one end and open at the other end; the outer wall of the heat exchange tube body is provided with heat exchange microchannel grooves, and the inner wall of the heat exchange tube body is provided with grooves arranged along the axial direction of the heat exchange tube body to increase the heat exchange area.

[0010] Furthermore, a heat exchange medium inlet pipe is inserted into the microchannel heat exchanger, and one open end of the microchannel heat exchanger is connected to the coolant return chamber; the heat exchange medium inlet pipe is connected to the coolant inlet chamber; the coolant return chamber and the coolant inlet chamber are sequentially arranged at the bottom of the reactor shell.

[0011] Furthermore, the coolant inlet chamber is provided with a coolant inlet, and the coolant return chamber is provided with a coolant outlet.

[0012] Furthermore, a first air inlet is provided at the top of the reactor cylinder.

[0013] Furthermore, a mixed liquid outlet pipe is connected to the bottom of the reactor cylinder, and the mixed liquid outlet pipe has an inverted U-shaped structure.

[0014] The beneficial effects of this utility model compared to the prior art are as follows:

[0015] This invention achieves maximum contact between the incoming gas and the heat exchanger through gas inlet pipes evenly arranged in the center and circumference, and microchannel heat exchangers arranged circumferentially in the inner layer; and the bubbler at the bottom can further disperse the incoming gas. The gas enters the reactor body and is released from the bottom of the body, directly contacting the heat exchange pipes, which can accelerate the gas purification rate. Other components mixed in the gas quickly come into contact with the washing liquid and are absorbed, and the pure gas is discharged from the purified gas outlet.

[0016] This invention combines a bubbler and a microchannel heat exchanger to achieve high-efficiency purification of the incoming gas and improve the purity of the purified gas. Attached Figure Description

[0017] Figure 1 This is an internal cross-sectional view of the microporous gas recovery reactor proposed in this utility model;

[0018] Figure 2 This is a top view of the microporous gas recovery reactor proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the gas inlet pipe of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of the heat exchange tube body described in this utility model;

[0021] Figure 5 for Figure 4 Sectional view along the AA direction.

[0022] In the picture:

[0023] 1. First air inlet; 2. Second air inlet; 4. Purified gas outlet; 5. Support plate; 6. Washing liquid inlet; 7. Gas inlet pipe; 8. Reactor shell; 9. Mixed liquid outlet pipe; 10. Microchannel heat exchanger; 12. Heat exchange medium inlet pipe; 13. Coolant outlet; 14. Coolant return chamber; 15. Coolant inlet chamber; 16. Coolant inlet; 17. Bubbler; 22. Spiral heat exchange microchannel groove; 23. Groove for increasing heat exchange area. Detailed Implementation

[0024] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, this utility model will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it. The technical solution of this utility model will be described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0025] See Figures 1 to 5 This embodiment proposes a microporous gas recovery reactor, including a reactor body 8. Five gas inlet pipes 7 are arranged axially within the reactor body 8, with one gas inlet pipe 7 located at the center of the reactor body 8, and the other four gas inlet pipes 7 evenly arranged around the center circumference of the reactor body 8. The bottom of each gas inlet pipe 7 extends to the bottom of the reactor body 8 and is equipped with a bubbler 17. The incoming gas is first released by the bubbler 17 and then discharged upwards from the bottom of the reactor body 8. Four microchannel heat exchangers 10 are arranged axially within the reactor body 8. The four microchannel heat exchangers 10 are evenly arranged around the center circumference of the reactor body 8 and are located inside the evenly arranged gas inlet pipes 7. A purified gas outlet 4 and a washing liquid inlet 6 are respectively provided on the sidewall of the reactor body 8.

[0026] Specifically, a support plate 5 is installed inside the reactor body 8, and the gas inlet pipe 7 is connected and fixed to the support plate 5. The central gas inlet pipe 7 is connected to the gas inlet pipes 7 evenly arranged around the center circumference, and the central gas inlet pipe 7 is connected to the second inlet port 2 located at the top of the reactor body 8. The gas to be purified enters into each gas inlet pipe 7 through the second inlet port 2, and is then released through the bubbler 17. The bubbler 17 is an existing device; in this embodiment, the bubbler 17 used is a micron-sized ceramic bubbler, model FB-ASSIST P series.

[0027] The microchannel heat exchanger 10 includes a heat exchange tube body, one end of which is closed and the other end is open. The outer wall of the heat exchange tube body is provided with heat exchange microchannel grooves 22, and the inner wall of the heat exchange tube body is provided with grooves 23 arranged axially along the heat exchange tube body to increase the heat exchange area. A heat exchange medium inlet pipe 12 is inserted into the microchannel heat exchanger 10, and the open end of the microchannel heat exchanger 10 is connected to a coolant return chamber 14. The bottom of the heat exchange medium inlet pipe 12 is connected to a coolant inlet chamber 15. The coolant return chamber 14 and the coolant inlet chamber 15 are sequentially arranged at the bottom of the reactor shell 8. The coolant inlet chamber 15 is provided with a coolant inlet 16, and the coolant return chamber 14 is provided with a coolant outlet 13.

[0028] To further improve the inlet rate of the gas to be purified, a first air inlet 1 is provided at the top of the reactor body 8 as a backup air inlet channel. A mixed liquid outlet pipe 9, which has an inverted U-shaped structure, is connected to the bottom of the reactor body 8. The mixed liquid generated after the reaction between the reactor body 8 and impurities in the gas is completed is discharged through the mixed liquid outlet pipe 9.

[0029] The working principle of a microporous gas recovery reactor proposed in this embodiment is as follows:

[0030] This embodiment uses the production of tributyl phosphate as an example. During the production of tributyl phosphate, hydrogen chloride gas carrying butanol is introduced into the first inlet 1 and / or the second inlet 2 of the microporous gas recovery reactor to separate the hydrogen chloride gas from the butanol. Phosphorus oxychloride is introduced through the gas washing liquid inlet 6 to absorb the butanol in the hydrogen chloride gas; phosphorus oxychloride enters the reactor cylinder 8 and reacts with the residual butanol in the gas to remove the butanol from the hydrogen chloride gas. During the reaction, the introduced gas and the mixture in the reaction system are rapidly cooled by heat exchange through the microchannel heat exchanger 10. The gas inlet pipes 7, which are evenly arranged in the center and circumference, and the microchannel heat exchanger 10 arranged in the inner layer, achieve maximum contact between the introduced gas and the heat exchanger; and the bubbler 17 at the bottom can further disperse the introduced gas. The gas enters the reactor cylinder 8 and is released from the bottom of the cylinder, directly contacting the heat exchange pipes, which can accelerate the gas purification rate.

[0031] In this process, the gas enters the bubbler 17 and undergoes an atomization reaction, allowing it to fully react with the washing liquid inside the reactor cylinder 8. This filters out other reactants carried in the gas to be purified, and the resulting clean gas flows out from the purified gas outlet 4. The reaction between the atomized gas and the washing liquid generates a large amount of heat. At this time, the coolant enters the coolant inlet chamber 15 through the coolant inlet 16, and then enters the microfluidic heat exchanger 10 through the heat exchange medium inlet pipe 12 to carry away the large amount of heat generated by the reaction. The coolant carrying the heat enters the coolant return chamber 14 and flows out from the coolant outlet 13.

[0032] The mixed liquid outlet pipe 9 is designed as a U-shaped bend to ensure that the washing liquid injected into the reactor cylinder 8 is at the same height as the U-shaped bend. Microchannel grooves are machined on both the inner and outer surfaces of the microfluidic heat exchanger 10 to increase the contact area, improve heat transfer efficiency, and enable rapid reactions to occur in the reactor.

[0033] The above description is a further detailed explanation of the present invention in conjunction with specific preferred embodiments. It should not be considered that the specific embodiments of the present invention are limited to this. For those skilled in the art, several simple deductions or substitutions can be made without departing from the present invention, and all such deductions or substitutions should be considered to fall within the scope of patent protection determined by the submitted claims.

Claims

1. A microporous gas recovery reaction device, characterized in that, The reactor includes a reactor body (8); multiple gas inlet pipes (7) are arranged along the axial direction of the reactor body (8) inside the reactor body (8), one gas inlet pipe (7) is arranged at the center of the reactor body (8), and the remaining gas inlet pipes (7) are evenly arranged around the central circumference of the reactor body (8); the bottom of the gas inlet pipe (7) extends to the bottom of the reactor body (8) and is equipped with a bubbler (17); multiple microchannel heat exchangers (10) are arranged along the axial direction of the reactor body (8) inside the reactor body (8); the multiple microchannel heat exchangers (10) are evenly arranged around the central circumference of the reactor body (8); and the multiple microchannel heat exchangers (10) are located inside the evenly arranged gas inlet pipes (7); the reactor body (8) is equipped with a purified gas outlet (4) and a washing liquid inlet (6).

2. The microporous gas recovery reactor according to claim 1, characterized in that, The reactor cylinder (8) is provided with a support plate (5), and the gas inlet pipe (7) is connected and fixed to the support plate (5).

3. The microporous gas recovery reaction device according to claim 1, characterized in that, The central gas inlet pipe (7) is connected to the gas inlet pipes (7) evenly arranged around the center circumference, and the central gas inlet pipe (7) is connected to the second inlet (2) set at the top of the reactor cylinder (8).

4. The microporous gas recovery reaction device according to claim 1, characterized in that, The microchannel heat exchanger (10) includes a heat exchange tube body, one end of which is closed and the other end is open. The outer wall of the heat exchange tube body is provided with a heat exchange microchannel groove (22), and the inner wall of the heat exchange tube body is provided with a groove (23) arranged along the axial direction of the heat exchange tube body to increase the heat exchange area.

5. The microporous gas recovery reactor according to claim 4, characterized in that, A heat exchange medium inlet pipe (12) is inserted into a microchannel heat exchanger (10), and one open end of the microchannel heat exchanger (10) is connected to a cooling liquid return chamber (14); the heat exchange medium inlet pipe (12) is connected to a cooling liquid inlet chamber (15); the cooling liquid return chamber (14) and the cooling liquid inlet chamber (15) are sequentially arranged at the bottom of the reactor shell (8).

6. The microporous gas recovery reactor according to claim 5, characterized in that, The coolant inlet chamber (15) is provided with a coolant inlet (16), and the coolant return chamber (14) is provided with a coolant outlet (13).

7. The microporous gas recovery reaction device according to claim 3, characterized in that, The reactor cylinder (8) is provided with a first air inlet (1) at the top.

8. The microporous gas recovery reactor according to claim 1, characterized in that, The bottom of the reactor cylinder (8) is connected to a mixed liquid outlet pipe (9), which has an inverted U-shaped structure.

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