Safe reaction apparatus for methanol oxidation

Abstract

The utility model discloses a methanol oxidation safe reaction device mainly relates to formaldehyde reaction equipment field. Including the cooperation of the heating equipment's reaction tank body, the vertical setting has the draft tube in the reaction tank body, and the draft tube with input port on the reaction tank body upper end is connected, be provided with a plurality of pipe orifices on the draft tube, and the liquid that the draft tube is guided flows out and enters the reaction tank body through the pipe orifice. The utility model has the beneficial effect that can guarantee the safe basis of methanol oxidation reaction, namely the mixed proportion of mixed raw gas and the mixing effect satisfy the requirement of methanol oxidation safe reaction, and then guarantee the derivative that the mixed raw gas material reaction produces is less, to satisfy the oxidation safe reaction demand of methanol.

Description

Technical Field

[0001] This utility model relates to the field of formaldehyde reaction equipment, specifically a safe reaction device for methanol oxidation. Background Technology

[0002] Methanol, also known as hydroxymethane, wood alcohol, or wood spirits, is an organic compound and the simplest saturated monohydric alcohol. The most common industrial production method for formaldehyde is the methanol oxidation reaction, which involves reacting methanol with oxygen or air to produce formaldehyde or diformaldehyde. Formaldehyde and diformaldehyde are commonly used chemical raw materials, used to manufacture many chemicals such as resins, dyes, coatings, and pharmaceuticals. For the safe production of formaldehyde oxidation, the reaction steps and conditions are crucial. Methanol is a liquid in its natural environment, but the reaction requires it to meet gaseous conditions. Therefore, it needs to stably undergo gas conversion during the reaction and mix with air and water vapor in the initial stage to obtain a mixed feed gas, thus meeting the needs of subsequent processing. However, controlling the dosage of these three gases during the liquid-to-gas conversion is difficult, and it is also impossible to ensure that the three gases are fully mixed before the oxidation reaction. This results in a large number of reaction byproducts in the methanol oxidation reaction and compromises its safety.

[0003] Based on the above issues, it is necessary to set up a safe methanol oxidation reaction device to ensure that the methanol oxidation reaction provides a safe basis. That is, the mixing ratio and mixing effect of the mixed raw gas meet the requirements of the safe methanol oxidation reaction, thereby ensuring that the byproducts generated by the reaction of the mixed raw gas are small, so as to meet the requirements of the safe methanol oxidation reaction. Utility Model Content

[0004] The purpose of this invention is to provide a safe methanol oxidation reaction device that can ensure that the mixing ratio and mixing effect of methanol and the original gas meet the requirements of the formaldehyde oxidation reaction, avoid safety problems during the formaldehyde oxidation reaction, achieve the maximum reaction effect, and avoid the generation of a large number of reaction byproducts.

[0005] To achieve the above objectives, this utility model employs the following technical solution: A safe methanol oxidation reaction device includes a reaction tank equipped with a heating device, a guide pipe vertically arranged inside the reaction tank and connected to an input port at the upper end of the reaction tank; multiple ports are provided on the guide pipe, through which liquid guided by the guide pipe flows out into the reaction tank.

[0006] The guide tube has a spiral structure, and multiple tube openings are equally spaced on the spiral guide tube.

[0007] Each of the pipe openings is connected to a spraying element, which sprays the liquid inside the guide pipe; and the opening of each spraying element is oriented upwards.

[0008] The spraying component is a spiral spray nozzle, and the spiral spray nozzle is connected to the pipe opening.

[0009] The heating equipment includes an overheating component and a constant temperature insulation component, both of which are configured to work in conjunction with the reaction vessel.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: In this setup, a guide pipe is installed within the reaction vessel to guide the fluid requiring gas-liquid conversion into the gas. The reaction vessel is heated to a temperature suitable for the input liquid's gas-liquid conversion, allowing the liquid flowing out of the guide pipe inlet to rapidly undergo gas conversion. Different guide pipes supply different, specified dosages of liquid, causing the input liquid to evaporate and mix within the reaction vessel, resulting in a mixed gaseous feed that meets production requirements. This ensures the effective application of the mixed gaseous feed in the subsequent oxidation reaction process, allowing it to proceed normally and safely. Attached Figure Description

[0011] Appendix Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Appendix Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0013] Appendix Figure 3 This is a schematic diagram of a partial internal structure of this utility model.

[0014] The labels shown in the attached diagram: 1. Reaction tank; 2. Guide pipe; 3. Input port; 4. Pipe inlet; 5. Spraying component; 6. Spiral spray nozzle. Detailed Implementation

[0015] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0016] Before the methanol oxidation reaction, methanol, air, and water vapor need to be mixed in a specific ratio to obtain a mixed gas mixture that meets the requirements for methanol production. This ensures the safety of the methanol oxidation reaction. Therefore, the mixing ratio and mixing effect of the mixed gas mixture are crucial to the oxidation reaction. If an improperly proportioned mixed gas mixture is used in the oxidation reaction, it will result in the formation of more byproducts and may also affect the reaction process and its effectiveness. Therefore, the preparation of the mixed gas mixture is very important for the entire oxidation reaction.

[0017] A safe methanol oxidation reaction apparatus includes a reaction tank 1 equipped with a heating device. A vertically arranged guide pipe 2 is installed inside the reaction tank 1, and the guide pipe 2 is connected to an input port 3 at the upper end of the reaction tank 1. Multiple ports 4 are provided on the guide pipe 2, through which the liquid guided by the guide pipe 2 flows out into the reaction tank 1. When setting up the guide pipe 2, two guide pipes 2 should be set up for methanol and water to meet the requirement of transporting methanol and water into the reaction tank 1. During the reaction operation, the reaction tank 1 is first preheated by the heating device to reach the temperature required for the gas-liquid conversion of water and methanol. Then, a specified dose of water and methanol is guided into the guide pipe 2. The liquid entering the guide pipe 2 will rapidly vaporize due to the temperature within the pipe 2 and flow out from the port 4 on the guide pipe 2. Simultaneously, the unvaporized liquid will also flow out from the guide pipe 2, detaching from it and vaporizing again. The vaporized water vapor and methanol gas will mix rapidly under the influence of temperature, resulting in a more thorough mixing of the water vapor and methanol gas. During the gas-liquid conversion process, dried air can be introduced into the reaction tank 1 through the opening to achieve thorough mixing of the three gases. However, it should be noted that because the air contains water vapor, it must be dried before being introduced into the reaction tank 1 to avoid affecting the gas ratio in the mixed gas mixture.

[0018] To ensure a more thorough mixing effect, the above structure is further configured and optimized as follows: 1. Because after the liquid is introduced into the guide pipe 2, it is necessary to ensure that the liquid in the guide pipe 2 is converted into gas as quickly as possible, and to minimize the amount of liquid falling to the bottom of the reaction vessel 1. Therefore, the guide pipe 2 is designed as a spiral structure, and multiple nozzles 4 are evenly spaced on the spiral structure of the guide pipe 2. With the guide pipe 2 designed as a spiral structure, the liquid remains in the guide pipe 2 for a longer time, and is heated for a longer period. At the same time, the spiral structure is more gentle, allowing the liquid entering the guide pipe 2 to be fully heated. In this state, a larger proportion of the liquid will complete the gas-liquid conversion within the guide pipe 2, thereby reducing the amount of liquid falling to the bottom of the reaction vessel 1. It should be noted that the bottom of the guide pipe 2 should be open, ensuring that the liquid introduced into the guide pipe 2 does not remain inside the guide pipe 2. However, the opening at the bottom of the guide pipe 2 should be as small as possible to increase the heating time of the liquid within the guide pipe 2, allowing more gas to diffuse out from the nozzles 4.

[0019] 2. Each of the pipe openings 4 is connected to a spraying element 5, which sprays the liquid inside the guide pipe 2. The opening of each spraying element 5 faces upwards. The spraying element 5 is a spiral spray nozzle 6, which is connected to the pipe opening 4. After the above structural arrangement, the gas vaporized inside the guide pipe 2 is sprayed outwards from the spiral spray nozzle 6. Since the temperature of the gas inside the reaction tank 1 is higher than that of the liquid, by setting the opening of the spraying element 5 upwards, the liquid sprayed along with the gas comes into contact with the higher-temperature gas immediately, thereby further accelerating the rate of liquid-to-gas conversion, shortening the production time of the mixed gas, and making the mixing effect more complete.

[0020] 3. The heating equipment includes an overheating heating component and a constant temperature insulation component, both of which are configured to work in conjunction with the reaction vessel 1. Specifically, they are configured using heating wires and constant temperature heating wires, and the heating temperature and time of the two heating components are controlled by a control system to meet the reaction requirements inside the reaction vessel 1.

[0021] Therefore, the methanol oxidation safety reaction device can ensure that the mixing ratio and mixing effect of methanol and the original gas meet the requirements of the formaldehyde oxidation reaction, avoid safety problems during the formaldehyde oxidation reaction, and achieve the maximum reaction effect while avoiding the generation of more reaction byproducts.

Claims

1. A safe reaction apparatus for methanol oxidation, characterized in that: The reaction vessel (1) is equipped with a heating device. A guide pipe (2) is vertically installed inside the reaction vessel (1), and the guide pipe (2) is connected to the input port (3) at the upper end of the reaction vessel (1). Multiple ports (4) are provided on the guide pipe (2), through which the liquid guided by the guide pipe (2) flows out and enters the reaction tank (1).

2. The safe methanol oxidation reaction apparatus according to claim 1, characterized in that: The guide tube (2) has a spiral structure, and multiple tube openings (4) are equally spaced on the guide tube (2) of the spiral structure.

3. The safe methanol oxidation reaction apparatus according to claim 2, characterized in that: Each of the pipe openings (4) is connected to a spraying element (5), through which the liquid in the guide pipe (2) is sprayed; Furthermore, the opening of each spraying component (5) is positioned facing upwards.

4. The safe methanol oxidation reaction apparatus according to claim 3, characterized in that: The spraying component (5) is a spiral spray nozzle (6), and the spiral spray nozzle (6) is connected to the pipe opening (4).

5. The safe methanol oxidation reaction apparatus according to claim 1, characterized in that: The heating equipment includes an overheating component and a constant temperature insulation component, both of which are configured in conjunction with the reaction vessel (1).

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