Continuous flow liquid oxidant oxidation reaction device

Abstract

The utility model discloses a continuous flow liquid oxidant oxidation reaction device which comprises a reaction raw material storage tank, a liquid oxidant storage tank, a first precooling assembly, a second precooling assembly, a static mixer and a pipeline reactor, the reaction raw material storage tank is sequentially connected with the first pre-cooling assembly and the static mixer through a pipeline; the liquid oxidant storage tank is sequentially connected with the second pre-cooling assembly and the static mixer through pipelines; the static mixer is connected with the pipeline reactor. Through the design of the static mixer and the pipeline reactor, on one hand, reaction materials and a liquid oxidant are fully and uniformly mixed, the oxidation reaction efficiency and the oxidation reaction effect are improved, and on the other hand, the backmixing phenomenon can be effectively avoided, so that the generation of peroxidation impurities is reduced, and intermediate-state products can be effectively extracted; through the design of the first pre-cooling assembly and the second pre-cooling assembly, the temperature when materials just make contact can be effectively reduced, it is ensured that the reaction temperature is controllable, and the oxidation reaction quality is improved.

Description

Technical Field

[0001] The utility model relates to the field of chemical reaction engineering, in particular to a continuous flow liquid oxidant oxidation reaction device. Background Art

[0002] Oxidation reaction is a common type of reaction in chemical and chemical reactions. There are two main types of oxidants used in oxidation reactions: one is gaseous oxidants, such as oxygen and chlorine; the other is liquid oxidants, such as sodium hypochlorite solution, potassium permanganate solution, peracetic acid, etc.

[0003] For oxidation reactions using liquid oxidants, most of the prior art uses a tank reactor as a reaction equipment. However, the tank reactor reaction has a phenomenon of material back-mixing, which has a very adverse effect on some reactions that are expected to stay in a relatively unstable intermediate state. For example, aldehydes are an important class of intermediates and are in great demand in the field of chemistry and chemical engineering. However, in the process of alcohol oxidation to aldehydes, it is easy to generate acid due to peroxidation, which affects the yield and quality of the aldehydes. Utility Model Content

[0004] The utility model provides a continuous-flow liquid oxidant oxidation reaction device, which can solve the problems of backflow and overoxidation in the existing liquid oxidant oxidation reaction in a kettle reactor.

[0005] In order to solve the above technical problems, the utility model provides a continuous flow liquid oxidant oxidation reaction device, comprising: a reaction raw material storage tank, a liquid oxidant storage tank, a first precooling component, a second precooling component, a static mixer and a pipeline reactor;

[0006] Wherein, the discharge port of the reaction raw material storage tank is sequentially connected to the first precooling component and the static mixer through a pipeline;

[0007] The discharge port of the liquid oxidant storage tank is sequentially connected to the second precooling component and the static mixer through a pipeline;

[0008] The outlet end of the static mixer is connected to the pipeline reactor.

[0009] In a preferred embodiment of the utility model, a first liquid flow meter is installed on the pipeline between the reaction raw material storage tank and the first pre-cooling component; a second liquid flow meter is installed on the pipeline between the liquid oxidant storage tank and the second pre-cooling component; the oxidation reaction device also includes a program controller;

[0010] The first liquid flow meter and the second liquid flow meter are connected to the program controller by signal;

[0011] The first liquid flow meter is connected to the first switch valve on the discharge port of the reaction raw material storage tank through the program controller in linkage control;

[0012] The second liquid flow meter is connected to the second switch valve on the discharge port of the liquid oxidant storage tank through the program controller.

[0013] In a preferred embodiment of the present invention, a first feed pump is also installed on the pipeline between the reaction raw material storage tank and the first pre-cooling component; a second feed pump is also installed on the pipeline between the liquid oxidant storage tank and the second pre-cooling component.

[0014] In a preferred embodiment of the present invention, the switch valves of the first feed pump and the second feed pump are connected to the program controller.

[0015] In a preferred embodiment of the present invention, the first precooling component includes a first circulation pipe and a first cooling water trough; the first circulation pipe is placed in the first cooling water trough, and the first cooling water trough has a first cooling water inlet and a first cooling water outlet.

[0016] In a preferred embodiment of the present invention, the depth of the first cooling water trough is greater than the height of the first circulation pipe, and the first circulation pipe is immersed in the cooling water of the first cooling water trough.

[0017] In a preferred embodiment of the present invention, the second precooling assembly includes a second circulation pipe and a second cooling water trough; the second circulation pipe is placed in the second cooling water trough, and the second cooling water trough has a second cooling water inlet and a second cooling water outlet.

[0018] In a preferred embodiment of the present invention, the depth of the second cooling water trough is greater than the height of the second circulation pipe, and the second circulation pipe is immersed in the cooling water of the second cooling water trough.

[0019] In a preferred embodiment of the present invention, the pipeline reactor is a straight pipeline reactor, a spiral pipeline reactor or a serpentine pipeline reactor.

[0020] In a preferred embodiment of the present invention, the outlet end of the pipeline reactor is connected to a material storage tank.

[0021] The beneficial effects of the utility model are as follows: the utility model is a continuous flow liquid oxidant oxidation reaction device, which, through the design of a static mixer and a pipeline reactor, can, on the one hand, fully and evenly mix the reaction materials and the liquid oxidant to improve the efficiency and effect of the oxidation reaction, and on the other hand, can effectively avoid the "back-mixing phenomenon", thereby reducing the generation of peroxide impurities and effectively extracting intermediate products; through the design of the first pre-cooling component and the second pre-cooling component, can effectively reduce the temperature of the material when it first contacts, ensure that the reaction temperature is controllable, improve the quality of the oxidation reaction, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the connection relationship of a preferred embodiment of a continuous flow liquid oxidant oxidation reaction device of the utility model;

[0023] The markings of the components in the accompanying drawings are as follows:

[0024] 10. Reaction raw material storage tank, 20. Liquid oxidant storage tank, 30. First pre-cooling component, 40. Second pre-cooling component, 50. Static mixer, 60. Pipeline reactor, 70. Material storage tank, 80. Program controller, 11. First switch valve, 12. First liquid flow meter, 13. First feed pump, 21. Second switch valve, 22. Second liquid flow meter, 23. Second feed pump, 31. First circulation pipe, 32. First cooling water trough, 321. Cooling water inlet, 322. First cooling water outlet, 41. Second circulation pipe, 42. Second cooling water trough, 421. Second cooling water inlet, 422. Second cooling water outlet. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0026] See also Figure 1 , the utility model embodiment includes:

[0027] The embodiment of the utility model discloses a continuous flow liquid oxidant oxidation reaction device, comprising: a reaction raw material storage tank 10, a liquid oxidant storage tank 20, a first precooling component 30, a second precooling component 40, a static mixer 50, a pipeline reactor 60, a material storage tank 70 and a program controller 80.

[0028] The discharge port of the reaction raw material storage tank 10 is connected to the first precooling assembly 30 and the static mixer 50 in sequence through a pipeline; the discharge port of the liquid oxidant storage tank 20 is connected to the second precooling assembly 40 and the static mixer 50 in sequence through a pipeline, so that the reaction material to be oxidized in the reaction raw material storage tank 10 and the liquid oxidant in the liquid oxidant storage tank 20 are simultaneously transported to the static mixer 50 for mixing. The static mixer 50 can quickly and evenly mix the above two materials together to promote the reaction.

[0029] The outlet end of the static mixer 50 is connected to the inlet end of the pipeline reactor 60 , and the outlet end of the pipeline reactor 60 is connected to the material storage tank 70 .

[0030] The pipeline reactor 60 is any one of a straight pipeline reactor, a spiral pipeline reactor or a serpentine pipeline reactor. The oxidation reaction material flows forward in a plug flow in the pipeline mixer and undergoes oxidation reaction. On the one hand, it can effectively avoid the "back mixing phenomenon", thereby reducing the generation of peroxide impurities and improving the oxidation reaction effect; on the other hand, it can effectively obtain intermediate products. The pipeline mixer 60 can also be spliced ​​with multiple pipe sections to extend the length of the reaction zone, so as to be suitable for mass production.

[0031] Specifically, a first switch valve 11, specifically a solenoid switch valve, is installed on the discharge port of the reaction raw material storage tank 10. A first liquid flow meter 12 and a first feed pump 13 are also installed on the pipeline between the reaction raw material storage tank 10 and the first precooling component 30.

[0032] A second switch valve 21, specifically a solenoid switch valve, is installed on the outlet of the liquid oxidant storage tank 20. A second liquid flow meter 22 and a second feed pump 23 are installed on the pipeline between the liquid oxidant storage tank 20 and the second precooling assembly 40.

[0033] The first liquid flow meter 12 is connected to the program controller 80 by signal, and is used to measure the outflow or delivery amount of the reaction material per unit time in real time.

[0034] The second liquid flow meter 22 is connected to the program controller 80 by signal, and is used for measuring the outflow or delivery amount of the liquid oxidant per unit time in real time.

[0035] The electromagnetic switch valves of the first feed pump 13 and the second feed pump 23 are respectively connected to the program controller 80 by signal, so as to realize the automatic control of the opening and closing of the first feed pump 13 and the second feed pump 23 and improve the degree of automation.

[0036] The first liquid flow meter 12 is connected to the first switch valve 11 on the discharge port of the reaction raw material storage tank 10 through the program controller 80 to adjust the opening of the first switch valve 11, thereby accurately controlling the flow of the reaction material.

[0037] The second liquid flow meter 22 is connected to the second switch valve 22 on the discharge port of the liquid oxidant storage tank 20 through the program controller 80 to adjust the opening of the second switch valve 22, thereby accurately controlling the flow of the liquid oxidant.

[0038] In addition, the program controller 80 can also adjust the opening of the first switch valve 11 and / or the second switch valve 21 through the flow signal sent by the first liquid flow meter 12 and the second liquid flow meter 22, so that the flow of the reaction material and the liquid oxidant reaches the precise ratio of the set target, thereby ensuring the effective progress of the oxidation reaction and avoiding insufficient oxidant dosage or overoxidation.

[0039] Specifically, the first pre-cooling assembly 30 includes a first circulation pipe 31 and a first cooling water tank 32. The first circulation pipe 31 is a serpentine pipe placed in the first cooling water tank 32. The depth of the first cooling water tank 32 is greater than the height of the first circulation pipe 31, so that the first circulation pipe 31 can be immersed in the cooling water of the first cooling water tank 31 to ensure the cooling effect and cooling uniformity. A first cooling water inlet 321 is provided on one side of the first cooling water tank 32, and a first cooling water outlet 322 is provided on the other side thereof.

[0040] The second precooling assembly 40 includes a second circulation pipe 41 and a second cooling water tank 42. The second circulation pipe 41 is a serpentine pipe placed in the second cooling water tank 42. The depth of the second cooling water tank 42 is greater than the height of the second circulation pipe 41, so that the second circulation pipe 41 can be immersed in the cooling water of the second cooling water tank 42 to ensure the cooling effect and cooling uniformity. A second cooling water inlet 421 is provided on one side of the second cooling water tank 42, and a second cooling water outlet 422 is provided on the other side thereof.

[0041] Since the oxidation reaction is usually an exothermic reaction, the design of the first precooling assembly 30 and the second precooling assembly 40 can allow the reaction materials and the liquid oxidant to be cooled before contacting in the static mixer 50, so that the instantaneous temperature of the oxidation reaction can be controlled.

[0042] The utility model provides a continuous flow liquid oxidant oxidation reaction device, which has the following advantages:

[0043] 1. The use of a static mixer allows the reaction materials and the liquid oxidant to be fully and evenly mixed, which helps to improve the reaction efficiency and oxidation reaction effect;

[0044] 2. Through the use of pipeline mixers, the reaction materials are made to move forward in a plug flow in the pipeline reactor, effectively avoiding the "back mixing phenomenon", thereby reducing the generation of peroxide impurities and effectively extracting intermediate products;

[0045] 3. Through the design of the first precooling component and the second precooling component, the temperature of the material when it first comes into contact can be effectively reduced, so that the reaction temperature can be controlled.

[0046] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A continuous flow liquid oxidant oxidation reaction device, characterized in that: include: A reaction raw material storage tank, a liquid oxidant storage tank, a first precooling assembly, a second precooling assembly, a static mixer and a pipeline reactor; Wherein, the discharge port of the reaction raw material storage tank is sequentially connected to the first precooling component and the static mixer through a pipeline; The discharge port of the liquid oxidant storage tank is sequentially connected to the second precooling component and the static mixer through a pipeline; The outlet end of the static mixer is connected to the pipeline reactor.

2. A continuous flow liquid oxidant oxidation reaction device according to claim 1, characterized in that: A first liquid flow meter is installed on the pipeline between the reaction raw material storage tank and the first pre-cooling component; a second liquid flow meter is installed on the pipeline between the liquid oxidant storage tank and the second pre-cooling component; the oxidation reaction device also includes a program controller; The first liquid flow meter and the second liquid flow meter are connected to the program controller by signal; The first liquid flow meter is connected to the first switch valve on the discharge port of the reaction raw material storage tank through the program controller in linkage control; The second liquid flow meter is connected to the second switch valve on the discharge port of the liquid oxidant storage tank through the program controller.

3. A continuous flow liquid oxidant oxidation reaction device according to claim 2, characterized in that: A first feed pump is also installed on the pipeline between the reaction raw material storage tank and the first pre-cooling component; a second feed pump is also installed on the pipeline between the liquid oxidant storage tank and the second pre-cooling component.

4. A continuous flow liquid oxidant oxidation reaction device according to claim 3, characterized in that: The switch valves of the first feed pump and the second feed pump are connected to the program controller.

5. A continuous flow liquid oxidant oxidation reaction device according to any one of claims 1 to 4, characterized in that: The first precooling component includes a first circulation pipe and a first cooling water trough; the first circulation pipe is placed in the first cooling water trough, and the first cooling water trough has a first cooling water inlet and a first cooling water outlet.

6. A continuous flow liquid oxidant oxidation reaction device according to claim 5, characterized in that: The depth of the first cooling water tank is greater than the height of the first circulation pipe, and the first circulation pipe is immersed in the cooling water of the first cooling water tank.

7. A continuous flow liquid oxidant oxidation reaction device according to claim 1, characterized in that: The second precooling assembly includes a second circulation pipe and a second cooling water trough; the second circulation pipe is placed in the second cooling water trough, and the second cooling water trough has a second cooling water inlet and a second cooling water outlet.

8. A continuous flow liquid oxidant oxidation reaction device according to claim 7, characterized in that: The depth of the second cooling water tank is greater than the height of the second circulation pipe, and the second circulation pipe is immersed in the cooling water of the second cooling water tank.

9. A continuous flow liquid oxidant oxidation reaction device according to any one of claims 1 to 4, characterized in that: The pipeline reactor is a straight pipeline reactor, a spiral pipeline reactor or a serpentine pipeline reactor.

10. A continuous flow liquid oxidant oxidation reaction device according to any one of claims 1 to 4, characterized in that: The outlet end of the pipeline reactor is connected to a material storage tank.

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