Exhaust valve and microchannel reaction device

Abstract

The application relates to an exhaust valve and a micro-channel reaction device, the exhaust valve comprising a valve body, a gas-liquid separation piece, an exhaust passage, a floating piece, a sealing piece and an elastic piece, the valve body being provided with a degassing chamber and an exhaust chamber which are connected in communication, the exhaust chamber being located above the degassing chamber, the degassing chamber being provided with a medium inlet and a medium outlet; the gas-liquid separation piece is arranged in the degassing chamber, the exhaust passage is arranged at the top of the exhaust chamber, the floating piece is arranged in the exhaust chamber and can move up and down, the sealing piece is fixedly arranged on the floating piece, the sealing piece can move upwards to a first position and downwards to a second position, when the sealing piece is in the first position, the sealing piece closes a first port, when the sealing piece is in the second position, the sealing piece opens the first port, and the elastic piece acts on the floating piece to exert an upward elastic force on the floating piece, so that the gas in the fluid medium is exhausted, and the reaction effect and stability of the fluid medium when used for reaction are improved.

Description

Technical Field

[0001] This application relates to the field of valve technology, and in particular to an exhaust valve and a microchannel reaction device. Background Technology

[0002] A microchannel reactor is a continuous-flow, miniaturized chemical reactor. The reaction zone consists of a series of parallel or series-connected microchannels, characterized by low liquid holdup, rapid reaction rates, and high mass and heat transfer efficiency. It is particularly suitable for highly exothermic, fast-reaction, and hazardous environments. In recent years, microchannel reactors have been increasingly adopted in hazardous chemical processes such as nitration, sulfonation, peroxidation, and oxidation.

[0003] For example, the production of ε-caprolactone commonly uses the indirect oxidation method of cyclohexanone. This involves first preparing peroxyacid with hydrogen peroxide, and then oxidizing cyclohexanone with the peroxyacid to obtain ε-caprolactone. This production process includes two highly hazardous chemical processes under strict regulation: peroxidation and oxidation. However, using a microchannel reactor for the ε-caprolactone production reaction can significantly reduce the liquid hold-up and residence time of peroxides, making it a safe and efficient production method.

[0004] During the reaction, the decomposition of small amounts of hydrogen peroxide and peroxyacid produces some gas. However, due to the small channel size of the microchannel reactor, direct venting is not possible, causing the gas to occupy reactor space, reducing material residence time and affecting heat transfer efficiency. Simultaneously, the easy compression of gas volume leads to reactor pressure fluctuations, affecting feed flow rate, disrupting the raw material ratio, and impacting product quality. Therefore, if the gas within the microchannel reactor channels cannot be vented in a timely manner, it will directly affect the reaction's effectiveness and stability. Utility Model Content

[0005] Therefore, it is necessary to provide an exhaust valve to discharge gas from the microchannel reactor channel, thereby improving the reaction efficiency and stability within the reactor.

[0006] This application provides an exhaust valve, including a valve body, a gas-liquid separator, an exhaust channel, a floating element, a sealing element, and an elastic element. The valve body has a connected degassing chamber and an exhaust chamber, with the exhaust chamber located above the degassing chamber. The degassing chamber has a medium inlet and a medium outlet. The gas-liquid separator is disposed in the degassing chamber and is used to cause bubbles entrained in the fluid medium flowing from the medium inlet to the medium outlet to coalesce, grow, and float upwards towards the exhaust chamber for separation. The exhaust channel is disposed at the top of the exhaust chamber and has a first port and a second port. The first port communicates with the exhaust chamber, and the second port communicates with the outside of the valve body. The floating element is movably disposed in the exhaust chamber. The sealing element is fixedly disposed in the floating element and can move upwards to a first position and downwards to a second position with the floating element. When the sealing element is in the first position, the sealing element closes the first port; when the sealing element is in the second position, the sealing element opens the first port. The elastic element acts on the floating element to apply an upward elastic force to the floating element.

[0007] In one embodiment, the inner wall of the exhaust passage is provided with a sealing liner, and when the seal is in the first position, the seal is interference-fitted with the sealing liner and blocks the exhaust passage.

[0008] In one embodiment, the floating element is a solid structure; and / or, the density of the floating element is 4 g / cm³. 3 ~10g / cm 3 .

[0009] In one embodiment, the elastic element is a conical compression spring, which is located below the floating element. The thicker end of the elastic element is connected to the lower end of the floating element, and the thinner end of the elastic element is connected to the bottom wall of the exhaust chamber.

[0010] In one embodiment, a connecting rod is fixedly provided at the upper end of the floating member, and the sealing member is fixedly provided on the connecting rod.

[0011] In one embodiment, a grille is provided at the connection between the exhaust chamber and the degassing chamber.

[0012] In one embodiment, the exhaust passage is provided with a one-way exhaust structure, which is arranged to allow gas in the exhaust passage to flow from the first port to the second port.

[0013] In one embodiment, the cross-sectional area of ​​the degassing chamber is 4 to 10 times the cross-sectional area of ​​the medium inlet along the medium flow direction.

[0014] In one embodiment, the gas-liquid separator is one or more of wire mesh packing, corrugated plate packing, multi-curved ring packing, and conjugate ring packing.

[0015] This application also provides a microchannel reaction device, including the exhaust valve described above.

[0016] Compared with the prior art, the exhaust valve provided in this application has at least the following advantages: a gas-liquid separator is provided in the degassing chamber of the exhaust valve to agglomerate and grow tiny bubbles in the fluid medium, thereby allowing the gas to float to the exhaust chamber. The floating component and sealing component in the exhaust chamber, together with the elastic component, realize automatic exhaust and sealing. When gas accumulates in the top space of the exhaust chamber, it will press down the liquid level in the exhaust chamber, reduce the buoyancy of the floating component, thereby driving the sealing component to open the exhaust channel for exhaust. As the gas is discharged and depressurized, the liquid level in the exhaust chamber will rise again, driving the floating component to float up and block the exhaust channel through the sealing component. This cycle repeats automatically to exhaust the gas in the fluid medium, thereby improving the reaction effect and stability of the fluid medium when used for reaction. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a side cross-sectional view of the seal of an exhaust valve according to an embodiment of this application when it is in the second position.

[0019] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle;

[0020] Figure 3 This is a side sectional view of an exhaust valve according to an embodiment of the present application, showing the seal between a first position and a second position.

[0021] Figure 4 This is a side cross-sectional view of the seal of an exhaust valve according to an embodiment of this application when it is in the first position.

[0022] Figure 5 This is a side cross-sectional view of the floating component of an exhaust valve according to an embodiment of this application, when it is submerged in a fluid medium.

[0023] Reference numerals: 100, valve body; 101, degassing chamber; 102, exhaust chamber; 103, medium inlet; 104, medium outlet; 105, gas-liquid separator; 106, exhaust passage; 107, first port; 108, second port; 109, floating element; 110, sealing element; 111, elastic element; 112, sealing liner; 113, connecting rod; 114, grille; 115, one-way exhaust structure; 116, one-way ball; 117, liquid level. Detailed Implementation

[0024] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0025] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," "side," "top," "bottom," and similar expressions used in this application are only for describing various exemplary structural parts and elements of this application. However, the use of these terms is only for the purpose of illustration and is determined based on the exemplary orientations shown in the accompanying drawings, and does not represent the only implementation. Since the embodiments disclosed in this application can be arranged in different orientations, these terms indicating orientation are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] It should be noted that "axial arrangement" means that the overall arrangement direction is along the axial direction, including but not limited to axial extension, and may be at an angle to the axial direction.

[0029] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0030] To solve the problem of gas being difficult to expel from fluid media, please refer to [link / reference]. Figures 1 to 5 This application provides an exhaust valve, including a valve body 100, a gas-liquid separator 105, an exhaust passage 106, a floating element 109, a sealing element 110, and an elastic element 111. The valve body 100 is provided with a degassing chamber 101 and an exhaust chamber 102 that are connected to each other. The exhaust chamber 102 is located above the degassing chamber 101. The degassing chamber 101 has a medium inlet 103 and a medium outlet 104. The gas-liquid separator 105 is disposed in the degassing chamber 101. The fluid medium flows into the degassing chamber 101 from the medium inlet 103 and then flows out of the degassing chamber 101 from the medium outlet 104. During the process of the fluid medium flowing through the degassing chamber 101, the gas-liquid separator 105 is used to cause the bubbles entrained in the fluid medium to coalesce, grow, and float upwards and separate towards the exhaust chamber 102.

[0031] An exhaust passage 106 is located at the top of the exhaust chamber 102. The exhaust passage 106 has a first opening 107 and a second opening 108. The first opening 107 communicates with the exhaust chamber 102, and the second opening 108 communicates with the outside of the valve body 100. A floating member 109 is movably disposed in the exhaust chamber 102. A sealing member 110 is fixedly disposed on the floating member 109. The sealing member 110 can move upward to a first position and downward to a second position with the floating member 109. When the sealing member 110 is in the first position, the sealing member 110 closes the first opening 107. When the sealing member 110 is in the second position, the sealing member 110 opens the first opening 107. An elastic member 111 acts on the floating member 109 to apply an upward elastic force to the floating member 109.

[0032] It is understandable that, since the exhaust chamber 102 and the degassing chamber 101 are connected, when the fluid medium flows through the degassing chamber 101, some of the fluid will also enter the exhaust chamber 102. After the floating part 109 is immersed in the fluid, it will be subjected to a certain buoyancy. That is, the floating part 109 moves up and down under the combined action of buoyancy, gravity and elasticity.

[0033] Please see Figure 1 , Figure 3 as well as Figure 4 Before the fluid medium is introduced into the degassing chamber 101, the seal 110 is in the second position, and the first port 107 of the exhaust channel 106 is connected to the exhaust chamber 102. The gas in the exhaust chamber 102 can be discharged outward through the exhaust channel 106. At this time, the force exerted by the elastic member 111 on the floating member 109 is equal to the sum of the weights of the floating member 109 and the seal 110.

[0034] After a fluid medium is introduced into the degassing chamber 101, some of the fluid medium will enter the exhaust chamber 102. Since the first opening 107 of the exhaust channel 106 is open, the fluid medium entering the exhaust chamber 102 will gradually squeeze out the original gas in the exhaust chamber 102 from the exhaust channel 106. As the liquid level 117 in the exhaust chamber 102 gradually rises, the floating member 109 will be partially immersed in the fluid medium and thus be buoyed. Under the action of buoyancy, the floating member 109 will drive the sealing member 110 to rise until the sealing member 110 moves to the first position and closes the first opening 107. At this time, the gas in the exhaust chamber 102 can no longer be discharged through the exhaust channel 106.

[0035] As the fluid medium continuously flows through the degassing chamber 101, the gas entrained in the fluid medium is intercepted, adhered, and agglomerated under the action of the gas-liquid separator 105. Finally, under the action of buoyancy, it floats upward into the exhaust chamber 102, thereby continuously increasing the amount of gas in the exhaust chamber 102 and increasing the gas pressure. This causes the fluid medium in the exhaust chamber 102 to be pushed down, that is, the liquid level 117 of the fluid medium will drop, and the buoyancy of the fluid medium on the floating member 109 will also decrease. At this time, the force of the elastic member 111 and the buoyancy of the fluid medium on the floating member 109 are insufficient to support the weight of the floating member 109 and the weight of the sealing member 110. Therefore, as the liquid level 117 drops, the floating member 109 and the sealing member 110 will also drop, thereby opening the first opening 107, and the gas in the exhaust chamber 102 can be discharged from the exhaust channel 106.

[0036] As the gas in the exhaust chamber 102 decreases, the gas pressure also drops, causing the liquid level 117 to rise again, which in turn causes the floating component 109 and the sealing component 110 to float upwards until the sealing component 110 returns to its second position and closes the first opening 107, thus stopping the exhaust process again. This process is repeated to intercept, coalesce, and discharge the gas in the fluid medium flowing through the degassing chamber 101, thereby achieving the purpose of degassing the fluid medium and improving the reaction efficiency and stability of the fluid medium when used in the reaction.

[0037] It is also worth mentioning that, please combine Figure 5 When the seal 110 is in the first position and closes the first opening 107, the gas in the exhaust chamber 102 no longer exits from the exhaust passage 106. At this time, the liquid level 117 of the fluid medium in the exhaust chamber 102 may still rise, compressing the gas in the exhaust chamber 102 until the gas pressure in the exhaust chamber 102 is balanced with the pressure of the fluid medium.

[0038] Understandably, when the seal 110 is in the first position and closes the first opening 107, the exhaust channel 106 acts as a barrier to the seal 110. Even if the liquid level 117 of the fluid medium rises, increasing the buoyancy of the floating member 109, the floating member 109 and the seal 110 will not rise further. This results in an increase in the volume of the floating member 109 immersed in the fluid medium, leading to the following situation: Figure 5 The example shown illustrates the situation where the floating element 109 is completely submerged in the fluid medium.

[0039] Please see Figure 4 and Figure 5 When the floating element 109 is completely submerged in the fluid medium, as the fluid medium continuously flows through the degassing chamber 101, the gas entrained in the fluid medium is intercepted, adhered, and agglomerated under the action of the gas-liquid separator 105. Finally, under the action of buoyancy, it floats upward into the exhaust chamber 102, thereby increasing the amount of gas in the exhaust chamber 102 and increasing the gas pressure. This will press down the fluid medium in the exhaust chamber 102, that is, the liquid level 117 of the fluid medium will drop.

[0040] In the early stage of the liquid level 117 falling, the floating element 109 is still completely submerged in the fluid medium. At this time, the buoyancy of the floating element 109 remains unchanged, and the positions of the floating element 109 and the sealing element 110 also remain unchanged. The sealing element 110 is still in the first position and closes the first opening 107.

[0041] As the liquid level 117 continues to drop, the upper part of the floating member 109 is exposed above the liquid level 117, and the buoyancy of the floating member 109 decreases. At this time, the sum of the buoyancy of the floating member 109 and the force of the elastic member 111, is in dynamic equilibrium with the sum of the weight of the floating member 109, the weight of the sealing member 110, and the downward force exerted by the exhaust channel 106 on the sealing member 110. The positions of the floating member 109 and the sealing member 110 remain unchanged, and the sealing member 110 remains in the first position and closes the first opening 107.

[0042] As the liquid level 117 continues to drop, the buoyancy of the floating component 109 decreases, and the downward force exerted by the exhaust channel 106 on the seal 110 also decreases until the downward force exerted by the exhaust channel 106 on the seal 110 decreases to zero. At this point, the sum of the buoyancy of the floating component 109 and the force exerted by the elastic component 111 is equal to the sum of the weights of the floating component 109 and the seal 110.

[0043] As the liquid level 117 continues to drop, the buoyancy of the floating component 109 decreases further. At this point, the sum of the weights of the floating component 109 and the seal 110 will be greater than the sum of the buoyancy of the floating component 109 and the force exerted by the elastic component 111. The floating component 109 and the seal 110 will move downwards under the influence of gravity. The seal 110 will move to the second position and open the first port 107, allowing the gas in the exhaust chamber 102 to be discharged outwards through the exhaust channel 106. At this point, the force exerted by the elastic component 111 on the floating component 109 will increase, so that the sum of the buoyancy of the floating component 109 and the force exerted by the elastic component 111 is in dynamic equilibrium with the sum of the weights of the floating component 109 and the seal 110.

[0044] As the gas in the exhaust chamber 102 is discharged, the liquid level 117 of the fluid medium in the exhaust chamber 102 will rise, which will drive the floating part 109 and the sealing part 110 to rise and reseal the first port 107. This process is repeated to intercept, coalesce and discharge the gas in the fluid medium flowing through the degassing chamber 101, thereby achieving the purpose of degassing the fluid medium and improving the reaction effect and stability of the fluid medium when used in the reaction.

[0045] In some embodiments of this application, the second port 108 of the exhaust passage 106 may be connected to the outside air or to other gas collection devices in order to collect, recycle or reuse the exhaust gas to improve environmental protection.

[0046] Please see Figure 2In some embodiments of this application, the inner wall of the exhaust passage 106 is provided with a sealing liner 112. When the seal 110 is in the first position, the seal 110 and the sealing liner 112 are interference-fitted and block the exhaust passage 106. It is understood that when the seal 110 and the sealing liner 112 are interference-fitted, there is static friction between the sealing liner 112 and the seal 110, which to some extent restricts the relative movement of the sealing liner 112 and the seal 110.

[0047] Specifically, when the floating element 109 and the sealing element 110 rise with the increase of the liquid level 117 of the fluid medium, the sealing element 110 is press-fitted with the sealing liner 112 to limit the floating element 109 and the sealing element 110 from continuing to rise with the increase of the liquid level 117. As the liquid level 117 of the fluid medium decreases, the buoyancy of the floating element 109 decreases, and the floating element 109 and the sealing element 110 tend to move downward. The frictional force of the sealing liner 112 on the sealing element 110 is upward. The sum of the buoyancy of the floating element 109, the action of the elastic element 111, and the static friction of the sealing liner 112 on the sealing element 110 is in dynamic equilibrium with the sum of the weights of the floating element 109 and the sealing element 110. As the liquid level 117 of the fluid medium continues to drop, the buoyancy of the floating element 109 continues to decrease, and the static friction force of the sealing liner 112 on the sealing element 110 increases until the static friction force of the sealing liner 112 on the sealing element 110 reaches the maximum static friction. At this time, the floating element 109 and the sealing element 110 are in a critical state. More specifically, when the floating element 109 and the sealing element 110 are in a critical state, the liquid level 117 of the fluid medium continues to drop, and the buoyancy of the floating element 109 will continue to decrease. Since the static friction of the sealing liner 112 on the sealing element 110 has reached the maximum static friction, the sum of the buoyancy of the floating element 109, the effect of the elastic element 111, and the static friction of the sealing liner 112 on the sealing element 110 will be less than the sum of the weights of the floating element 109 and the sealing element 110. Under the action of gravity, the floating element 109 and the sealing element 110 will move downward, thereby causing the sealing element 110 to disengage from the interference fit with the sealing liner 112, thus opening the first port 107 for venting.

[0048] As the gas in the exhaust chamber 102 is discharged, the liquid level 117 of the fluid medium in the exhaust chamber 102 will rise, which will drive the floating part 109 and the sealing part 110 to rise. The sealing part 110 and the sealing liner 112 will re-interference fit and close the first opening 107. This process is repeated to intercept, coalesce and discharge the gas in the fluid medium flowing through the degassing chamber 101, thereby achieving the purpose of degassing the fluid medium and improving the reaction effect and stability of the fluid medium when it is used in the reaction.

[0049] In some embodiments of this application, the floating member 109 is a solid structure, which improves its pressure resistance, reduces its deformation under pressure, and enhances the operational reliability of the exhaust valve. For example, the floating member 109 may be a solid spherical structure to balance the pressure on its outer surface, further reducing its deformation. It is understood that deformation of the floating member 109 will cause changes in the buoyancy force acting on it, reducing the positional accuracy of the floating member 109 and the sealing member 110 during vertical movement. This reduces the sealing performance of the sealing member 110 in its first position, affecting the operational reliability of the exhaust valve.

[0050] It is also worth mentioning that the solid structure of the floating component 109 can improve its corrosion resistance.

[0051] In some embodiments of this application, both the seal 110 and the sealing liner 112 can be made of flexible sealing materials, such as polytetrafluoroethylene (PTFE), silicone, perfluoroether rubber (FFKM), and polyetheretherketone (PEEK). For example, in the production of ε-caprolactone, the seal 110 is made of flexible polytetrafluoroethylene (PTFE).

[0052] In some embodiments of this application, the density of the floating element 109 is 4 g / cm³. 3 ~10g / cm 3 This further enhances the corrosion resistance of the floating component 109. Furthermore, under these density conditions, the floating component 109 exhibits stronger resistance to disturbances and more stable up-and-down movement as it floats with the rise and fall of the fluid medium's liquid surface 117.

[0053] For example, the floating element 109 uses a density of 4.5 g / cm³. 3 A solid sphere made of titanium; floating component 109 uses a material with a density of 7.98 g / cm³. 3 The solid sphere is made of stainless steel; the floating component 109 uses a material with a density of 8.89 g / cm³. 3 The solid sphere is made of Hastelloy alloy, which also ensures the corrosion resistance of the floating part 109.

[0054] It should be noted that the density of the floating component 109 refers to the ratio of the total mass to the total volume of the floating component 109. For a hollow floating component 109, the density of the floating component 109 will be lower than the material density of the floating component 109.

[0055] Please combine Figure 1 , Figures 3 to 5In some embodiments of this application, the elastic element 111 is a conical compression spring. The elastic element 111 is located below the floating element 109. The compression of the elastic element 111 applies an upward force to the floating element 109. The greater the compression of the elastic element 111, the greater the force on the floating element 109. Due to the rise and fall of the liquid level 117 of the fluid medium, the elastic element 111 will be immersed in the fluid medium. The surface of the elastic element 111 can be coated with an anti-corrosion layer or an anti-oxidation layer, or the elastic element 111 itself can be made of anti-corrosion and anti-oxidation materials, such as a metal spring.

[0056] For other components of the exhaust valve, such as the valve body 100 and the exhaust passage 106, the preferred materials are stainless steel, duplex steel, titanium, Hastelloy, and other metallic materials. For example, in the production of ε-caprolactone, Hastelloy is preferred as the metallic material.

[0057] The thick end of the elastic element 111 is connected to the lower end of the floating element 109, and the thin end of the elastic element 111 is connected to the bottom wall of the exhaust chamber 102, so as to further improve the stability of the floating element 109 during the up and down floating process.

[0058] Please continue reading Figure 1 , Figures 3 to 5 In some embodiments of this application, a connecting rod 113 is fixedly provided at the upper end of the floating member 109, and a sealing member 110 is fixedly provided on the connecting rod 113. Under the premise of ensuring that the sealing member 110 can move up and down with the floating member 109, the sealing member 110 is prevented from being submerged in the fluid medium during the rise and fall of the liquid level 117.

[0059] Furthermore, the connecting rod 113 is made of a thin rod, which reduces the impact of the connecting rod 113 being immersed in the fluid medium on the buoyancy of the floating component 109 during the rise and fall of the liquid level 117. In addition, when the connecting rod 113 is provided, the weight of the connecting rod 113 also needs to be added when considering the weight calculation of the floating component 109 and the seal 110.

[0060] In some embodiments of this application, a grille 114 is provided at the connection between the exhaust chamber 102 and the degassing chamber 101 to allow fluid medium and gas to flow between the exhaust chamber 102 and the degassing chamber 101. Additionally, the grille 114 also prevents the gas-liquid separator 105 located in the degassing chamber 101 from entering the exhaust chamber 102 as the gas rises, thus acting as a barrier to the gas-liquid separator 105.

[0061] In some other embodiments of this application, the valve body 100 has a split structure, that is, the exhaust chamber 102 and the degassing chamber 101 are two independent parts. The exhaust chamber 102 and the degassing chamber 101 are connected by a grille 114, which serves not only as the bottom wall of the exhaust chamber 102 but also as the top wall of the degassing chamber 101, and as an intermediate connecting member between the exhaust chamber 102 and the degassing chamber 101. The elastic member 111 can be installed on the grille 114.

[0062] For example, the grille 114 is made of stainless steel and is fixed between the exhaust chamber 102 and the degassing chamber 101 by means of flanges, chucks, buckles and other fixing structures, which makes it easy to disassemble and assemble.

[0063] Of course, the exhaust chamber 102, the grille 114, and the degassing chamber 101 can also be fixed together by welding. Similarly, the exhaust passage 106 and the exhaust chamber 102 can also be fixed together by welding. Among them, the weld seams need to be pickled to ensure sealing. After the exhaust valve passes the pressure test, the oil stains on the inner and outer surfaces of the exhaust valve are removed and pickled and passivated.

[0064] Please see Figures 1 to 5 In some embodiments of this application, a one-way exhaust structure 115 is provided within the exhaust passage 106. The one-way exhaust structure 115 is arranged to allow gas in the exhaust passage 106 to flow from the first port 107 to the second port 108. For example, please refer to [link to relevant documentation]. Figure 2 As shown, the one-way exhaust structure 115 can be a one-way ball 116 disposed in the exhaust channel 106. Of course, the one-way exhaust structure 115 can also adopt other existing one-way exhaust methods, which are not limited in this application.

[0065] Specifically, when no fluid medium is introduced into the degassing chamber 101, the seal 110 is in the second position, and the first port 107 is open. At this time, the one-way exhaust structure 115 blocks the exhaust passage 106 to prevent external gas from flowing into the exhaust chamber 102 through the second port 108. When a fluid medium is introduced into the degassing chamber 101 and enters the exhaust chamber 102, the gas in the exhaust chamber 102 is squeezed out of the exhaust passage 106 by the fluid medium. During the process of squeezing out the gas, the one-way exhaust structure 115 opens so that the gas in the exhaust chamber 102 can be discharged from the exhaust passage 106. When the seal 110 is in the first position and closes the first port 107, the one-way exhaust structure 115 is in the state of blocking the exhaust passage 106. Of course, the one-way exhaust structure 115 can also be in the state of not blocking the exhaust passage 106. Due to the sealing effect of the seal 110, the external gas from the exhaust valve will not flow into the exhaust chamber 102 through the second port 108.

[0066] For example, the one-way exhaust structure 115 adopts the configuration described in the embodiments of this application. Figure 2The one-way ball 116 shown has a first opening 107 oriented vertically and a second opening 108 oriented horizontally. The one-way ball 116 is positioned at the corner of the exhaust channel 106. When the seal 110 is in the first position and closes the first opening 107, the one-way ball 116 moves downwards under its own weight, blocking the vertical section of the exhaust channel. When gas in the exhaust chamber 102 is exhausted through the exhaust channel 106, the one-way ball 116 rises under the action of the airflow and opens the vertical section of the exhaust channel 106, allowing gas to flow from the first opening 107 to the second opening 108 and be discharged outwards.

[0067] Please continue reading Figure 1 In some embodiments of this application, the cross-sectional area of ​​the degassing chamber 101 along the medium flow direction is 4 to 10 times the cross-sectional area of ​​the medium inlet 103, so that the flow velocity of the fluid medium in the degassing chamber 101 is 0.1 to 0.25 times the flow velocity at the medium inlet 103, that is, the flow velocity of the fluid medium in the degassing chamber 101 is reduced so that the gas-liquid separator 105 intercepts and coalesces the gas in the fluid medium.

[0068] In one specific embodiment of this application, the degassing chamber 101 is cylindrical, that is, the cross-section of the degassing chamber 101 is circular along the direction of medium flow. Similarly, the cross-sectional shape of the medium inlet 103 can also be designed to be regular to facilitate the calculation of the cross-sectional ratio, thereby facilitating the control of the flow rate changes of the fluid medium.

[0069] In some embodiments of this application, the gas-liquid separator 105 is one or more of wire mesh packing, corrugated plate packing, multi-curved ring packing, and conjugate ring packing, as long as it meets the degassing requirements of the fluid medium.

[0070] This application also provides a microchannel reaction device, including an exhaust valve as described in any of the above embodiments.

[0071] For example, in the production of ε-caprolactone, the exhaust valve provided in this application embodiment can be installed before hydrogen peroxide enters the microchannel reactor mixer of the peroxidation reaction, or between the microchannel reactor of the peroxidation reaction and the microchannel reactor of the oxidation reaction, or at the outlet of the microchannel reactor of the oxidation reaction. The specific setting location and number can be configured according to actual production needs, and this application does not limit them.

[0072] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0073] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. An exhaust valve characterized by, include: The valve body (100) is provided with a degassing chamber (101) and an exhaust chamber (102) that are connected to each other. The exhaust chamber (102) is located above the degassing chamber (101). The degassing chamber (101) has a medium inlet (103) and a medium outlet (104). A gas-liquid separator (105) is provided in the degassing chamber (101) to cause bubbles entrained in the fluid medium flowing from the medium inlet (103) to the medium outlet (104) to coalesce, grow, and float upwards and separate towards the exhaust chamber (102); An exhaust passage (106) is provided at the top of the exhaust chamber (102). The exhaust passage (106) has a first port (107) and a second port (108). The first port (107) communicates with the exhaust chamber (102), and the second port (108) communicates with the outside of the valve body (100). A floating component (109) is movably disposed within the exhaust chamber (102); A sealing element (110) is fixedly disposed on the floating element (109). The sealing element (110) can move upward to a first position and downward to a second position along with the floating element (109). When the sealing element (110) is in the first position, the sealing element (110) closes the first opening (107). When the sealing element (110) is in the second position, the sealing element (110) opens the first opening (107). An elastic element (111) acts on the floating element (109) to apply an upward elastic force to the floating element (109).

2. The exhaust valve according to claim 1, characterized in that, The inner wall of the exhaust passage (106) is provided with a sealing liner (112). When the sealing element (110) is in the first position, the sealing element (110) and the sealing liner (112) are press-fitted together and block the exhaust passage (106).

3. The exhaust valve according to claim 1, characterized in that, The floating component (109) is a solid structure; and / or the density of the float (109) is 4 g / cm 3 10 g / cm 3 .

4. The exhaust valve of claim 1, wherein The elastic element (111) is a conical compression spring. The elastic element (111) is located below the floating element (109). The thick end of the elastic element (111) is connected to the lower end of the floating element (109), and the thin end of the elastic element (111) is connected to the bottom wall of the exhaust chamber (102).

5. The exhaust valve of claim 1, wherein, The upper end of the floating component (109) is fixedly provided with a connecting rod (113), and the sealing component (110) is fixedly provided on the connecting rod (113).

6. The exhaust valve of claim 1, wherein A grille (114) is provided at the connection between the exhaust chamber (102) and the degassing chamber (101).

7. The exhaust valve of claim 1, wherein The exhaust passage (106) is provided with a one-way exhaust structure (115), which is arranged to allow gas in the exhaust passage (106) to flow from the first port (107) to the second port (108).

8. The exhaust valve of claim 1, wherein, Along the direction of medium flow, the cross-sectional area of ​​the degassing chamber (101) is 4 to 10 times the cross-sectional area of ​​the medium inlet (103).

9. The exhaust valve of claim 1, wherein, The gas-liquid separator (105) is one or more of the following: wire mesh packing, corrugated plate packing, multi-curved ring packing, and conjugate ring packing.

10. A microchannel reaction device, characterized in that, Includes the exhaust valve as described in any one of claims 1 to 9.

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