Microchannel reactor and process

Abstract

The application discloses a kind of microchannel reactor and method, it is related to chemical reaction equipment technical field, it solves the technical problem that existing reaction kettle is used for catalyst reduction reaction, channel is often narrow and easy to block, it is difficult to design integration, for the cold and hot exchange of reaction and generated requirement high, including the shell of reactor, shell top end is set first feed inlet, middle end is set multilayer fluid material distribution plate, bottom end is set discharge port, fluid material distribution plate is set from top to bottom: first layer fluid material distribution plate, including a plurality of first through hole, each first through hole is set first fluid hose that can penetrate lower layer through hole;By analogy: the aperture of lower layer through hole is all greater than the aperture of upper layer through hole, and consistent in quantity;Upper layer fluid hose one end is connected with upper layer through hole, and the other end is nested in lower layer fluid hose upper portion by lower layer through hole;Feed inlet is set between adjacent two layers of fluid material distribution plate;Fluid hose is made of flexible material.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of chemical reaction equipment, more particularly to the technical field of micro-channel reactor. BACKGROUND

[0002] Gas-liquid reaction, liquid-liquid reaction are common reactions in chemical production process, gas-liquid reaction generally occurs in the reaction kettle, the principle of gas-liquid reaction is that the reaction gas and the reaction liquid are in full contact, under certain reaction conditions, the gas and liquid react to generate target compounds. The gas material is introduced into the bottom of the reaction vessel through the gas pipeline, and is stirred by the stirring paddle to realize uniform mixing with the liquid material and reaction.

[0003] The reaction kettle is a commonly used chemical equipment, including a cylinder, a cavity is arranged in the cylinder, a stirrer is arranged in the cavity, a gas phase inlet and a liquid phase inlet are arranged on the cylinder, and some reaction kettles are also provided with a jacket for heating and cooling of the cylinder. When working, the reactants are introduced into the cavity of the cylinder, and the reactants are fully reacted by stirring to obtain the predetermined target product.

[0004] However, when the existing reaction kettle is used for catalyst reduction reaction, the channel is often narrow and easy to block, it is difficult to discharge a large amount of product, it is difficult to design integration, and the cold and heat exchange generated during the reaction is required to be high. SUMMARY

[0005] The purpose of the present application is to solve the problems of the existing reaction kettle used for catalyst reduction reaction, such as narrow channel, easy to block, difficult to discharge a large amount of product, difficult to design integration, and high requirement for cold and heat exchange generated during the reaction, and to provide a micro-channel reactor.

[0006] In order to achieve the above purpose, the present application specifically adopts the following technical scheme:

[0007] A micro-channel reactor, comprising a shell of a reactor, a first feed inlet arranged at the top end of the shell, a plurality of fluid material distribution plates arranged at the middle end, and a discharge port arranged at the bottom end,

[0008] The fluid material distribution plates are arranged from top to bottom as follows:

[0009] The first layer of fluid material distribution plate comprises a plurality of first through holes, and a first fluid hose capable of penetrating the lower layer through hole is arranged on each first through hole;

[0010] By analogy: the hole diameter of the lower layer through hole is larger than that of the upper layer through hole, and the number is consistent; one end of the upper layer fluid hose is connected with the upper layer through hole, and the other end is nested in the upper part of the lower layer fluid hose through the lower layer through hole; a feed inlet is arranged between the adjacent two layers of fluid material distribution plates;

[0011] The fluid hose is made of flexible material.

[0012] As an optional technical solution, the first through holes on the first fluid material distribution plate are uniformly arranged, and each upper layer through hole and lower layer through hole are concentric holes with different diameters.

[0013] As an optional technical solution, each layer of fluid hose is detachably connected with the through hole of the layer through the connecting port of the layer, and the connecting port is arranged at the bottom of each layer through hole.

[0014] As an optional technical solution, the end of each layer of fluid hose is a normally closed liquid lock port. When there is no fluid passing through, the end is closed; when there is fluid passing through, the end is open.

[0015] As an optional technical solution, the other end of the upper layer fluid hose is nested in the upper part of the lower layer fluid hose, the nesting length of the upper layer fluid hose is X, and the length of the end of the upper layer fluid hose and the end of the lower layer fluid hose is 1.5X-2X, wherein X is a natural number greater than 200, and the unit of length is mm.

[0016] As an optional technical solution, the flexible material includes ethylene propylene terpolymer, expanded silica gel and PTFE.

[0017] As an optional technical solution, the number of fluid material distribution plates is 2, and a second feeding port is arranged between the first layer fluid material distribution plate and the second layer fluid material distribution plate.

[0018] As an optional technical solution, a conical distribution hopper is arranged between the bottom layer fluid material distribution plate and the discharge port, and a plurality of distribution holes are arranged on the conical distribution hopper.

[0019] As an optional technical solution, for the second layer fluid material distribution plate, the distribution holes of the conical distribution hopper are distributed in an increasing manner from bottom to top.

[0020] A method for using a micro-channel reactor, comprising the following steps:

[0021] Step one: two or more fluid materials are brought into the upper of the first layer fluid material distribution plate through the first feeding port under pressure;

[0022] Step two: under the action of pressure, the first fluid material is uniformly distributed on the first layer fluid material distribution plate, and then flows into the corresponding first fluid hose through the first through hole;

[0023] Step three: the second fluid material is brought into the upper of the second layer fluid material distribution plate through the second feeding port under pressure;

[0024] Step four: under the pressure, the second material is uniformly distributed on the second fluid material distribution plate, and then flows into the second inflow fluid hose through the corresponding second inflow hole;

[0025] Step five: repeating steps three and four until all fluid materials are added, the upper fluid hose is nested in the upper part of the lower fluid hose at the other end, the nesting length of the upper fluid hose is X, the length of the end of the upper fluid hose and the end of the lower fluid hose is 1.5X-2X, wherein X is a natural number, and the unit of length is mm;

[0026] Step six: the mixed liquid after mixing reaction is flowed into the conical distribution hopper, the conical distribution hopper is provided with a distribution hole, and the mixed liquid is flowed to the outlet through the distribution hole.

[0027] The beneficial effects of the present application are as follows:

[0028] 1. The liquid flow rate is distributed by pressure distribution, so that the upper and lower fluid material distribution plates can uniformly distribute the reaction materials. Since the material is transported by pressure in the front section, the reaction liquid after distribution enters the turbulent reaction section (the section between the end of the upper fluid hose and the end of the lower fluid hose is the turbulent reaction section). The micro-channel reactor forms liquid turbulence and performs high-efficiency reaction, thereby achieving the purpose.

[0029] 2. The first through holes on the first fluid material distribution plate are uniformly arranged, and each upper through hole and lower through hole is a concentric hole with different diameters. According to the actual use scene, the size is changed according to the pressure change, and the turbulent reaction is self-adaptively adjusted, which is realized by 3D printing.

[0030] 3. The flexible material has good anti-fouling performance, so that the equipment designed by the present application has the functions of good cleaning-free and maintenance-free, and meets the non-corrosion resistance. DETAILED DESCRIPTION

[0031] Figure 1 is a schematic diagram of the overall structure of the present application;

[0032] Figure 2 is a schematic diagram of the fluid material distribution plate structure of the present application;

[0033] Figure 3 is a schematic diagram of the middle end structure of the present application;

[0034] Figure 4 is a schematic diagram of the bottom end structure of the present application.

[0035] Figure markings: 1-shell, 2-first layer fluid material distribution plate, 21-first through hole, 22-first connecting port, 23-first fluid hose, 3-second layer fluid material distribution plate, 31-second through hole, 32-second connecting port, 33-second fluid hose, 4-conical diverter bucket, 41-diverter hole, 5-discharge port, A1-first feed port, A2-second feed port. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0038] Example 1

[0039] See also Figure 1 This embodiment provides a microchannel reactor, comprising a reactor shell 1, a first feed port A1 disposed at the top of the shell, a multi-layer fluid material distribution plate disposed at the middle end, and a discharge port 5 disposed at the bottom end.

[0040] The fluid material distribution plate is set from top to bottom as follows:

[0041] The first layer of fluid material distribution plate 2 includes a plurality of first through holes 21, each of which is provided with a first fluid hose 23 that can pass through the lower layer through holes;

[0042] Similarly: the apertures of the lower through-holes are larger than those of the upper through-holes, and the number is the same; one end of the upper fluid hose is connected to the upper through-hole, and the other end is nested in the upper middle part of the lower fluid hose through the lower through-hole; a feed port is set between two adjacent layers of fluid material distribution plates;

[0043] The fluid hose is made of flexible material.

[0044] By distributing the liquid flow rate under pressure, the upper and lower fluid material distribution plates can evenly distribute the reaction materials. Since the front section transports the materials under pressure, the reaction liquid at the rear end enters the turbulent reaction section after distribution. The turbulent reaction section is between the end of the upper fluid hose and the end of the lower fluid hose. Due to the formation of liquid turbulence in the microchannel reactor, efficient reaction will be carried out to achieve the purpose.

[0045] Embodiment 2

[0046] Please refer to Figure 2 The first layer fluid material distribution plate 2 is provided with first through holes 21, and each upper layer through hole and lower layer through hole are concentric holes with different diameters. Each layer of fluid hose is detachably connected with the through hole of the layer through the connecting port of the layer, and the connecting port is arranged at the bottom of each layer through hole.

[0047] The first layer fluid material distribution plate is provided with first through holes, and each upper layer through hole and lower layer through hole are concentric holes with different diameters. According to the actual use scene, the corresponding size change is made according to the pressure change, and the self-adaptive adjustment of turbulent reaction is realized through 3D printing.

[0048] Embodiment 3

[0049] The end of each layer of fluid hose is a normally closed liquid lock port. When there is no fluid passing through, the end is closed. When there is fluid passing through, the end is open.

[0050] Increase the pressure to enhance the reaction effect of the reaction liquid after distribution into the turbulent reaction section.

[0051] Embodiment 4

[0052] Please refer to Figure 3 The other end of the upper layer fluid hose is nested in the upper part of the lower layer fluid hose, the nesting length of the upper layer fluid hose is X, and the length of the end of the upper layer fluid hose and the end of the lower layer fluid hose is 1.5X-2X, wherein X is a natural number, and the unit of length is mm.

[0053] According to the actual use scene X is 200, the middle end of the reactor is provided as a freely stackable structure, and the top layer is the first layer fluid material distribution plate 2, which can be detachably connected with the top end with the first feeding port.

[0054] The stack structure is:

[0055] Each middle end of the shell is composed of a plurality of detachable intermediate layers. Each intermediate layer includes a shell body as a side wall and a fluid material distribution plate as a bottom. A matching feeding port is arranged on each layer of side wall. It should be noted that the first intermediate layer connected with the top end includes the first layer fluid material distribution plate 2 at the top, and the top of the remaining intermediate layers is the bottom of the previous layer.

[0056] Preferably, the flexible material includes ethylene-propylene-diene rubber, expanded silica gel and PTFE.

[0057] Preferably, the number of fluid material distribution plates is 2, and the second feeding port A2 is arranged between the first layer fluid material distribution plate 2 and the second layer fluid material distribution plate 3.

[0058] Example 4

[0059] Please refer to Figure 4 , the bottom fluid material distribution plate and the discharge port 5 are provided with a conical flow distributor 4, and a plurality of flow distribution holes 41 are arranged on the conical flow distributor 4. The flow distribution holes 41 of the conical flow distributor 4 are distributed in a manner of increasing from bottom to top.

[0060] Due to the action of pressure, the reaction mixture is sprayed from the fluid hose of the bottom fluid material distribution plate into the conical flow distributor, a part is directly sprayed out through the flow distribution holes 41 and flows to the discharge port 5; another part is sprayed on the inner wall of the conical flow distributor 4, and due to the action of pressure, it is sprayed on the bottom fluid material distribution plate again, so that the backflow turbulence is increased, and the pressure is increased, and the reaction mixture is better sprayed out through the flow distribution holes 41, and the process of continuous spraying-backflow turbulence is repeated, so that the reaction is completed, and finally the reaction mixture is discharged from the discharge port 5 to complete a complete reaction.

[0061] Example 5

[0062] A method for using a micro-channel reactor, comprising the following steps:

[0063] Step one: two or more than two kinds of fluid materials, the first kind of fluid material is brought into the upper of the first layer fluid material distribution plate 2 through the first inlet A1 under pressure;

[0064] Step two: under the action of pressure, the first kind of fluid material is uniformly distributed on the first layer fluid material distribution plate 2, and then flows into the corresponding inflow first fluid hose 23 through the inflow first through hole 21;

[0065] Step three: the second kind of fluid material is brought into the upper of the second layer fluid material distribution plate 3 through the second inlet A2 under pressure;

[0066] Step four: under the action of pressure, the second kind of fluid material is uniformly distributed on the second layer fluid material distribution plate 3, and then flows into the corresponding inflow second fluid hose 33 through the inflow second through hole 31;

[0067] Step five: repeat steps three and four until all fluid materials are added, the other end of the upper fluid hose is nested in the upper part of the lower fluid hose, the nesting length of the upper fluid hose is X, and the length of the end of the upper fluid hose and the end of the lower fluid hose is 1.5X-2X, wherein X is a natural number greater than 200, and the unit of length is mm;

[0068] Step six: the mixed liquid after reaction is mixed through the bottom fluid hose, flows into the conical flow distributor (4), and the conical flow distributor 4 is provided with flow distribution holes 41, and the mixed liquid flows to the discharge port 5 through the flow distribution holes 41.

[0069] As mentioned above, from the second fluid material, the new fluid material will flow into the interlayer of two adjacent hoses, continue to mix with the previous material, start the mixing reaction, so that two materials are divided into several parts in the same proportion, and then corresponding reaction one by one;

[0070] The mixed liquid flows into the cone bottom. Since the distribution holes 41 of the conical distribution funnel 4 are distributed in an increasing manner from bottom to top, the number of holes in the cone bottom is small, so that the flow is not urgent, the liquid is turned up, and the efficiency of the mixing reaction is enhanced.

[0071] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A microchannel reactor, characterized in that: It comprises a reactor shell (1), a first feed port (A1) provided at the top of the shell, a multi-layer fluid material distribution plate provided at the middle end, and a discharge port (5) provided at the bottom end. The fluid material distribution plate is set from top to bottom as follows: A first layer of fluid material distribution plate (2), comprising a plurality of first through holes (21), each of the first through holes (21) being provided with a first fluid hose (23) capable of passing through the lower layer through holes; Similarly: the apertures of the lower through-holes are larger than those of the upper through-holes, and the number is the same; one end of the upper fluid hose is connected to the upper through-hole, and the other end is nested in the upper middle part of the lower fluid hose through the lower through-hole; a feed port is set between two adjacent layers of fluid material distribution plates; Fluid hoses are made of flexible materials; The first through holes (21) on the first layer of fluid material distribution plate (2) are evenly arranged, and each upper layer through hole and each lower layer through hole are concentric holes with different diameters; Each layer of fluid hose is detachably connected to the through hole of the same layer through the connecting port of the same layer, and the connecting port is arranged at the bottom of the through hole of each layer.

2. A microchannel reactor according to claim 1, characterized in that, The end of each layer of fluid hose is a normally closed liquid lock port. When no fluid passes through, the end is closed, and when fluid passes through, the end is open.

3. A microchannel reactor according to claim 1, characterized in that, The other end of the upper fluid hose is nested in the upper middle portion of the lower fluid hose. The nesting length of the upper fluid hose is X. The length between the end of the upper fluid hose and the end of the lower fluid hose is 1.5X-2X, where X is a natural number and the unit of length is mm.

4. A microchannel reactor according to claim 1, characterized in that, The flexible material includes EPDM rubber, expanded silicone rubber and PTFE.

5. A microchannel reactor according to claim 1, characterized in that, The number of the fluid material distribution plates is 2, and a second feed port (A2) is provided between the first layer of fluid material distribution plates (2) and the second layer of fluid material distribution plates (3).

6. A microchannel reactor according to claim 1, characterized in that, A conical diversion hopper (4) is provided between the bottom fluid material distribution plate and the discharge port (5), and a plurality of diversion holes (41) are provided on the conical diversion hopper (4).

7. A microchannel reactor according to claim 6, characterized in that, The diversion holes (41) of the conical diversion hopper (4) are distributed in an increasing manner from bottom to top.

8. A method for using a microchannel reactor according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Two or more fluid materials are included, and the first fluid material is pressurized into the top of the first layer of fluid material distribution plate (2) through the first feed port (A1); Step 2: Under pressure, the first fluid material is evenly distributed on the first layer of fluid material distribution plate (2), and then flows into the corresponding first fluid hose (23) through the first through hole (21); Step 3: The second fluid material enters the second layer of fluid material distribution plate (3) under pressure through the second feed port (A2); Step 4: Under the influence of pressure, the second material is evenly distributed on the second layer of fluid material distribution plate (3), and then flows into the corresponding second fluid hose (33) through the second through hole (31); Step 5: Repeat steps 3 and 4 until all the fluid materials are added. The other end of the upper fluid hose is nested in the upper middle portion of the lower fluid hose. The nesting length of the upper fluid hose is X. The length between the end of the upper fluid hose and the end of the lower fluid hose is 1.5X-2X, where X is a natural number greater than 200 and the length unit is mm. Step 6: The mixed liquid after the reaction is mixed through the bottom fluid hose and flows into the conical diversion hopper (4). The conical diversion hopper (4) has a diversion hole (41) and flows to the discharge port (5) through the diversion hole (41).

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