Micro-channel dropwise adding type tubular reactor

Abstract

The utility model discloses a micro-channel dropwise adding tubular reactor, and solves the problems that in the prior art, when some violent reaction materials are added, a large amount of reaction heat is released in a short time, and if the heat cannot be removed in time, potential safety hazards such as chemical explosion can be caused; 2, continuous quantitative production cannot be carried out, so that the production cost is too high; the device is characterized in that a micro-channel dripping device is arranged at the inlet end of each reaction tube, the reaction tubes are inserted into the sleeve type heat exchange tubes, every two adjacent reaction tubes are connected in series into a whole, a heat exchange medium inlet tube and a heat exchange medium outlet tube are arranged at the two ends of each sleeve type heat exchange tube, and materials in the reaction tubes and heat exchange media in the sleeve type heat exchange tubes are subjected to countercurrent flow heat exchange. Reaction heat is removed in time, and continuous and safe operation of production can be ensured. The micro-channel dropwise adding tubular reactor has the advantages of safety, high efficiency, low cost and the like, and can be widely applied to industries such as petrochemical engineering, fine chemical engineering, food, biological pharmacy and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of medical and chemical engineering equipment, especially relates to a microchannel dropwise adding type tubular reactor. BACKGROUND

[0002] The tubular reactor is a kind of continuous operation reactor in tubular shape, and the length-diameter ratio is very large, and it can be divided into single-tube reactor and multi-tube reactor according to structure, and it can be divided into horizontal tubular reactor, vertical tubular reactor and coil tubular reactor according to installation mode.The horizontal tubular reactor is composed of single tube (straight tube or coil tube) continuous or multi-parallel arranged tubes, and generally is provided with jacketed tube or shell tube type heat exchange device. When operating, the material is continuously added from one end, continuously reacts in the tube, and continuously flows out from the other end, so that the required conversion is achieved, and it is widely used in medical, chemical production. Since the pipeline structure of the prior art is relatively simple, a large amount of reaction heat is discharged in a short time when some reaction violent materials are added, and if the heat cannot be removed in time, it will cause safety hidden trouble problems such as chemical explosion, and the prior art is difficult to meet the mass production problem of reaction violent medium for production enterprises. SUMMARY

[0003] The utility model aims at providing a microchannel dropwise adding type tubular reactor with scientific and reasonable structure, saving equipment investment, improving production capacity and ensuring use safety for the market.

[0004] The technical scheme of the utility model is as follows: it is composed of reaction tube, jacketed tube heat exchange pipe, inlet and outlet pipe and control device, the reaction tube is inserted into the jacketed tube heat exchange pipe, two adjacent reaction tubes are connected in series to form an integrated body, the inlet pipe and the outlet pipe are arranged at the two ends of the reaction tube connected in series to form an integrated body, and the microchannel dropwise adding device is arranged at the inlet end of each reaction tube, so that the added material and the main reaction material flow into the reaction tube. The heat exchange medium outlet pipe and the heat exchange medium inlet pipe are arranged at the two ends of each jacketed tube heat exchange pipe, the heat exchange medium inlet pipe of each jacketed tube heat exchange pipe is connected with the heat medium inlet main pipe in parallel, and the heat exchange medium outlet pipe is connected with the outlet main pipe in parallel.

[0005] Further, the microchannel dropwise adding device is composed of microchannel feeding pipe and dropwise adding control device, one end of the microchannel feeding pipe is inserted into the inlet pipe end of the reaction tube at a certain angle, so that the added material and the main reaction material flow into the reaction tube, and the dropwise adding control device is arranged on the microchannel feeding pipe.

[0006] Further, the heat exchange medium in the jacketed tube heat exchange pipe and the material in the reaction tube carry out countercurrent heat exchange, and the flow of the added material into the reaction tube is adjusted according to the reaction temperature and pressure in the reaction tube by the microchannel dropwise adding device.

[0007] The utility model discloses a beneficial effect is: because in each reaction tube entrance end has added micro -channel drop -by -drop device, makes the violent chemical reaction dispersion in different reaction tube and carries out, can effectively prevent the short -time because of the release of a large number of reaction heat in the process of feeding and leads to chemical explosion etc. Safety hidden danger problem. With safe, efficient, low -cost etc. Advantage, especially solved the mass production problem of the reaction violent medium, can be widely used in petrochemical industry, fine chemical industry, food and biological pharmaceutical etc. Industry.

[0008] The following structural drawing further illustrates the utility model. DRAWINGS

[0009] Figure 1 It is elbow connecting main view structural schematic diagram of the utility model;

[0010] Figure 2 It is straight pipe connecting main view structural schematic diagram of the utility model.

[0011] In the drawing: 1 is micro -channel drop -by -drop device, 2 is reaction tube, 3 is the sleeve type heat exchange pipe, 4 is heat exchange medium inlet pipe, 5 is heat exchange medium outlet pipe, 6 is feed pipe mouth, 7 is discharge pipe mouth. SPECIFIC IMPLEMENTATION

[0012] As Figure 1 , Figure 2As shown, a kind of microchannel dropwise addition type tubular reactor is composed of reaction tube 2, jacketed heat exchange tube 3, inlet and outlet pipe and control device etc., reaction tube 2 is inserted in jacketed heat exchange tube 3, and two adjacent reaction tubes 2 are connected into one, and inlet pipe 6 and outlet pipe 7 are arranged at the both ends of the reaction tube 2 connected into one, and microchannel dropwise addition device 1 is arranged at the inlet end of each reaction tube 2, so that the dropwise addition material and main reaction material enter reaction tube 2 in the same direction.The microchannel dropwise addition device 1 is composed of microchannel feeding pipe and dropwise addition control device, one end of the microchannel feeding pipe is inserted into reaction tube 2 at a certain angle, and dropwise addition control device is arranged on the microchannel feeding pipe.Outlet pipe 5 and inlet pipe 4 of heat exchange medium are arranged at both ends of each jacketed heat exchange tube 3, and the inlet pipe 4 of heat exchange medium of each jacketed heat exchange tube 3 is connected with heat medium inlet main pipe in parallel after being connected, and the outlet pipe 5 of heat exchange medium is connected with outlet main pipe in parallel after being connected, so that the heat exchange medium in jacketed heat exchange tube 3 and the material in reaction tube 2 carry out countercurrent heat exchange, and the flow of dropwise addition material into reaction tube is adjusted according to the temperature and pressure in reaction tube 2 by microchannel dropwise addition device 1.When the utility model is implemented, addition mixed material pipe can also be installed before inlet pipe 6, which is suitable for the reaction of multiple materials.After the reaction materials are mixed, they are pumped into reaction tube 2 from inlet pipe 6, heat exchange medium enters jacketed heat exchange tube 3 from inlet pipe 4 of heat exchange medium to exchange heat with the materials in reaction tube 2, and the materials in reaction tube 2 react under the condition of set process temperature after heat exchange.When the production of material which needs to be added to react violently and generate a large amount of heat is carried out, A reaction material enters the first reaction tube 2, and microchannel dropwise addition device 1 is opened at the same time, B material is dropwise added and reacts in the first reaction tube, and the mixed material after reaction enters the second reaction tube, and B material is continuously dropwise added and reacts in the second reaction tube, and then enters the third reaction tube 2, and B material is continuously dropwise added and reacts in the third reaction tube 2, and then enters the fourth, fifth or even more reaction tubes in turn, until B material is continuously added and no reaction occurs (temperature and pressure do not change), and the reaction endpoint is reached.The other reaction material is dispersed and added into each reaction tube 1 by microchannel control device, so that chemical explosion and other safety accidents caused by violent reaction and a large amount of heat are effectively prevented.The material after reaction is discharged from outlet pipe 7, and the heat source after heat exchange is discharged from outlet 5 of heat exchange medium.The microchannel dropwise addition tubular reactor has the advantages of safety, high efficiency and low cost, and can be widely used in petrochemical industry, fine chemical industry, food and biopharmaceutical industry etc.

[0013] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A microchannel dropwise tubular reactor comprising a reaction tube (2), a jacketed heat exchange tube (3), inlet and outlet ports and control means, characterized in that: The reaction tube (2) is inserted into the jacketed heat exchange tube (3), two adjacent reaction tubes (2) are connected in series, the feed pipe (6) and the discharge pipe (7) are arranged at the two ends of the series connection reaction tube (2), and the micro-channel dropping device (1) is arranged at the inlet end of each reaction tube (2), so that the dropping material and the main reaction material flow into the reaction tube (2) in sequence; the heat exchange medium inlet pipe (4) and the heat exchange medium outlet pipe (5) are arranged at the two ends of each jacketed heat exchange tube (3), the heat exchange medium inlet pipes (4) of each jacketed heat exchange tube (3) are connected with the heat medium inlet main pipe in parallel, and the heat exchange medium outlet pipes (5) are connected with the outlet main pipe in parallel.

2. The microchannel trickle-bed reactor of claim 1, wherein: The micro-channel dropping device (1) is composed of a micro-channel feeding pipe and a dropping control device, the micro-channel feeding pipe is obliquely inserted into the inlet end of the reaction tube (2), and the dropping control device is arranged on the micro-channel feeding pipe.

3. The microchannel trickle-bed reactor of claim 1 or 2, wherein: The heat exchange medium in the jacketed heat exchange tube (3) and the material in the reaction tube (2) carry out countercurrent heat exchange, the flow of the dropping material into the reaction tube is adjusted by the micro-channel dropping device (1) according to the reaction temperature and pressure in the reaction tube (2).

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