Micro-channel dropwise adding type tubular reactor

Abstract

The invention 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 present invention belongs to the field of pharmaceutical and chemical equipment, and particularly relates to a microchannel dropping tubular reactor. Background Art

[0002] A tubular reactor is a continuous operation reactor in the shape of a tube with a large length-diameter ratio. According to the structure, it can be divided into a single-tube reactor and a multi-tube reactor. According to the installation method, it can be divided into a horizontal tubular reactor, a vertical tubular reactor, and a coil tubular reactor. For example, a horizontal tubular reactor is composed of a single tube (straight tube or coil tube) continuously or multiple parallel tubes, and generally is provided with a sleeve or shell-and-tube heat exchange device. During operation, the material is continuously added from one end, continuously reacts in the tube, and continuously flows out from the other end, thus achieving the required conversion. It is widely used in pharmaceutical and chemical production. Due to the relatively simple pipeline structure of the prior art, when adding some violently reacting materials, a large amount of reaction heat is released in a short time. If the heat cannot be removed in time, it will lead to safety hazard problems such as chemical explosion. It is very difficult for the prior art to meet the mass production problem of violently reacting media by production enterprises. Summary of the Invention

[0003] The purpose of the present invention is to provide a microchannel dropping tubular reactor in the market with a scientific and reasonable structure, saving equipment investment, improving production capacity, and ensuring safe use.

[0004] The technical solution of the present invention is: It is composed of components such as a reaction tube, a sleeve-type heat exchange tube, inlet and outlet nozzles, and a control device. The reaction tube is inserted into the sleeve-type heat exchange tube. Adjacent two reaction tubes are connected in series to form an integral body. A feed nozzle and a discharge nozzle are provided at both ends of the reaction tubes connected in series, and a microchannel dropping device is provided at the inlet end of each reaction tube, so that the dropped material and the main reaction material enter the reaction tube in a co-current manner. Heat exchange medium outlet tubes and heat exchange medium inlet tubes are provided at both ends of each sleeve-type heat exchange tube. The heat exchange medium inlet tubes of each sleeve-type heat exchange tube are connected in parallel and then connected to the main supply medium inlet pipe, and the heat exchange medium outlet tubes are connected in parallel and then connected to the outlet main pipe.

[0005] Further, the microchannel dropping device is composed of a microchannel feeding tube and a dropping control device. One end of the microchannel feeding tube is inserted into the inlet tube end of the reaction tube at a certain angle, so that the dropped material and the main reaction material enter the reaction tube in a co-current manner, and a dropping control device is provided on the microchannel feeding tube.

[0006] Further, the heat exchange medium in the sleeve-type heat exchange tube and the material in the reaction tube perform counter-current heat exchange, and the microchannel dropping device adjusts the flow rate of the dropped material entering the reaction tube according to the reaction temperature and pressure in the reaction tube.

[0007] The beneficial effects of the present invention are as follows: Since a microchannel dropping device is added at the inlet end of each reaction tube, the violent chemical reaction is dispersed in different reaction tubes, which can effectively prevent potential safety hazards such as chemical explosion caused by the release of a large amount of reaction heat in a short time during a one-time feeding process. It has the advantages of safety, high efficiency, and low cost. In particular, it solves the problem of mass production of highly reactive media and can be widely applied to industries such as petrochemical, fine chemical, food, and biopharmaceutical industries.

[0008] The following structural drawings further illustrate the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a front view structural schematic diagram of the elbow connection of the present invention; Figure 2 It is a front view structural schematic diagram of the straight pipe connection of the present invention.

[0010] In the figure: 1 is a microchannel dropping device, 2 is a reaction tube, 3 is a double-pipe heat exchanger tube, 4 is a heat exchange medium inlet pipe, 5 is a heat exchange medium outlet pipe, 6 is a feed pipe orifice, and 7 is a discharge pipe orifice. DETAILED DESCRIPTION OF THE INVENTION

[0011] Such as Figure 1 、 Figure 2As shown in the figure, a microchannel dropping tube reactor is composed of components such as a reaction tube 2, a double-tube heat exchange tube 3, inlet and outlet pipes, and a control device. The reaction tube 2 is inserted into the double-tube heat exchange tube 3, and two adjacent reaction tubes 2 are connected in series. A feed inlet pipe 6 and a discharge outlet pipe 7 are provided at both ends of the reaction tubes 2 connected in series, and a microchannel dropping device 1 is provided at the inlet end of each reaction tube 2, so that the dropped material and the main reaction material enter the reaction tube 2 in a co-current manner. The microchannel dropping device 1 is composed of a microchannel feeding pipe and a dropping control device. One end of the microchannel feeding pipe is inserted into the reaction tube 2 at a certain angle, and a dropping control device is provided on the microchannel feeding pipe. Heat exchange medium outlet pipes 5 and heat exchange medium inlet pipes 4 are provided at both ends of each double-tube heat exchange tube 3. The heat exchange medium inlet pipes 4 of each double-tube heat exchange tube 3 are connected in parallel to the main supply medium inlet pipe, and the heat exchange medium outlet pipes 5 are connected in parallel to the outlet main pipe, so that the heat exchange medium in the double-tube heat exchange tube 3 and the material in the reaction tube 2 perform counter-current heat exchange. The microchannel dropping device 1 adjusts the flow rate of the dropped material entering the reaction tube according to the temperature and pressure in the reaction tube 2. When implementing the present invention, a mixed material adding pipe mouth can also be installed before the feed inlet pipe 6, which is suitable for the reaction of multiple materials. After the reaction materials are mixed, they are pumped into the reaction tube 2 from the feed inlet pipe 6 by a material pump. The heat exchange medium enters the double-tube heat exchange tube 3 through the heat exchange medium inlet pipe 4 to exchange heat with the material in the reaction tube 2. After heat exchange, the material in the reaction tube 2 reacts under the set process temperature conditions. When producing materials that require the addition of materials with violent reactions and a large amount of heat generation, reaction material A enters from the first reaction tube 2, and at the same time, the microchannel dropping device 1 is opened to drop reaction material B to react in the first reaction tube. The reacted mixed material enters the second reaction tube, and at the same time, reaction material B is dropped to continue reacting in the second reaction tube 2, and then enters the third reaction tube 2, and at the same time, reaction material B is dropped to continue reacting in the third reaction tube 2, and then enters the fourth, fifth, and even more reaction tubes in sequence until no more reaction occurs (the temperature and pressure do not change) after continuing to drop reaction material B. At this point, the reaction end point is reached. By dispersedly adding another reaction material into each reaction tube 1 through the microchannel control device, safety accidents such as chemical explosions caused by a large amount of heat generated due to violent reactions can be effectively prevented. The material after the reaction is discharged from the material outlet pipe 7, and the heat source after heat exchange is discharged through the heat exchange medium outlet 5. The microchannel dropping tube reactor has the advantages of safety, high efficiency, low cost, etc., and can be widely used in industries such as petrochemical, fine chemical, food, and biopharmaceutical industries.

[0012] As described above, the above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A microchannel dripping tubular reactor, comprising a reaction tube (2), a sleeve-type heat exchange tube (3), an inlet and outlet pipe port and a control device, characterized in that: The reaction tubes (2) are inserted into the tube-type heat exchange tubes (3), and two adjacent reaction tubes (2) are connected in series to form an integral whole. A feed pipe opening (6) and a discharge pipe opening (7) are provided at both ends of the reaction tubes (2) connected in series to form an integral whole. A microchannel dropping device (1) is provided at the inlet end of each reaction tube (2) so that the dropped material and the main reaction material flow into the reaction tube (2) in parallel. A heat exchange medium inlet pipe (4) and a heat exchange medium outlet pipe (5) are provided at both ends of each tube-type heat exchange tube (3). The heat exchange medium inlet pipe (4) of each tube-type heat exchange tube (3) is connected in parallel to a heat supply medium inlet main pipe, and the heat exchange medium outlet pipe (5) is connected in parallel to an outlet main pipe.

2. A microchannel dripping tubular reactor according to claim 1, characterized in that: The microchannel dripping device (1) is composed of a microchannel feeding tube and a dripping control device. The microchannel feeding tube is obliquely inserted into the inlet end of the reaction tube (2), and the dripping control device is arranged on the microchannel feeding tube.

3. A microchannel dripping tubular reactor according to claim 1 or 2, characterized in that: The heat exchange medium in the shell-and-tube heat exchange tube (3) performs countercurrent heat exchange with the material in the reaction tube (2), and the flow rate of the material dripped into the reaction tube is adjusted by the microchannel dripping device (1) according to the reaction temperature and pressure in the reaction tube (2).

Images