Reaction tank for cyanohydrin production

Abstract

The utility model discloses a reaction tank for cyanohydrin production, which comprises a tank body, a plurality of feeding pipes are circumferentially arranged on the side wall of the tank body, inlet ends of the feeding pipes are communicated with different raw material tanks, outlet ends of the feeding pipes are provided with spray heads, raw material liquids sprayed by the spray heads intersect, booster pumps are arranged between the feeding pipes and the raw material tanks, and the booster pumps are communicated with the spray heads. A driving motor is arranged at the top of the tank body, the output end of the driving motor extends into the tank body and is connected with an airflow assembly in the tank body, the driving motor drives the airflow assembly to generate upward airflow, and the airflow acts on the ejected raw material liquid. According to the utility model, raw materials required by cyanohydrin production can be fully and uniformly mixed in the reaction tank, so that the neutralization reaction efficiency is improved, salt is fully dissolved in water, and the phenomenon that pipelines or valves of subsequent equipment are blocked due to crystallization and separation of fixed salt in the cyanohydrin production process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cyanohydrin production, in particular to a reaction tank used for cyanohydrin production. Background Art

[0002] The process of producing cyanohydrin by reacting hydrogen cyanide and methylthiopropionaldehyde requires the use of alkali as a catalyst. After the reaction is completed, acid needs to be added to neutralize the alkali into salt. The generated salt is insoluble in organic matter such as cyanohydrin and will precipitate in the form of crystals, causing blockage of pipes and valves of subsequent equipment, affecting normal production.

[0003] Although organic bases are currently used as catalysts, the solubility of the salt generated after the neutralization of the organic base with the acid in the organic liquid is not high, and crystals will still precipitate, causing blockage of subsequent pipelines and valves. Utility Model Content

[0004] The utility model aims to provide a reaction tank for cyanohydrin production, which can fully and evenly mix the raw materials required for cyanohydrin production in the reaction tank, improve the efficiency of neutralization reaction, make salt fully dissolved in water, and avoid solid salt crystallization and precipitation during the cyanohydrin production process to block the pipelines or valves of subsequent equipment.

[0005] In order to solve the above technical problems, the present invention adopts the following solutions:

[0006] A reaction tank for cyanohydrin production comprises a tank body, wherein a plurality of feed pipes are circumferentially arranged on a side wall of the tank body, wherein the inlet ends of the plurality of feed pipes are connected to different raw material tanks, and the outlet ends of the plurality of feed pipes are provided with nozzles, and the raw material liquids sprayed by the plurality of nozzles intersect with each other, a booster pump is provided between the feed pipes and the raw material tanks, and a drive motor is provided on the top of the tank body, wherein the output end of the drive motor extends into the tank body and is connected to an airflow component in the tank body, and the drive motor drives the airflow component to generate an upward airflow, and the airflow acts on the sprayed raw material liquid.

[0007] In this solution, a plurality of feed pipes are provided around the side wall of the tank body, and the feed pipes are used to transport the raw material liquid in different raw material tanks into the reaction tank. The feed pipes are made of suitable materials according to the different raw materials to be transported to avoid being corroded by the raw material liquid. The setting of multiple feed pipes can ensure that the raw material liquid is sprayed in from multiple directions at the same time, which is conducive to the uniform mixing of the raw materials. A nozzle is provided at the outlet end of each feed pipe, and the raw material liquid sprayed by the nozzle intersects in the tank body, so that the raw material liquid forms a staggered jet stream in the tank body, which further promotes the mixing and reaction of the raw materials. A booster pump is provided between the feed pipe and the raw material tank. The function of the booster pump is to increase the pressure of the raw material liquid when it enters the feed pipe, thereby ensuring that the raw material liquid can be sprayed out of the nozzle at a higher speed to form fine droplets or atomization. The effect is beneficial to the neutralization reaction. A driving motor is provided on the top of the tank body. The output end of the driving motor extends into the tank body and is connected to the airflow component. The driving motor drives the airflow component to generate an upward airflow. The airflow acts on the ejected raw material liquid. The airflow can further refine the raw material droplets and increase the contact area of ​​each raw material droplet, which is beneficial to the reaction. The airflow can form a disturbance on the raw material liquid ejected from the tank body, so that the raw material liquids are further mixed, thereby reducing the risk of crystal precipitation. The airflow can also help to take away the heat and gas generated by the reaction in time, maintain the temperature and pressure in the tank body stable, which is beneficial to the continuous reaction. The upward airflow can also slow down the descending speed of each raw material liquid, extend the mixing time of each raw material liquid, and make the mixing more uniform.

[0008] This reaction tank for reducing crystal precipitation in cyanohydrin production achieves uniform mixing and injection of the raw material liquid through the arrangement of multiple feed pipes and nozzles; the injection speed of the raw material liquid is increased by a booster pump; an upward airflow is generated by an airflow component driven by a drive motor, further refining the raw material droplets, stirring the raw material liquid and gas mixture, and helping to carry away the heat and gas generated by the reaction, effectively reducing the risk of crystal precipitation blocking the pipelines or valves of subsequent equipment during the cyanohydrin production process.

[0009] Optionally, the raw material liquid sprayed by the multiple nozzles intersects with the vertical center line of the tank body.

[0010] Optionally, the multiple nozzles are arranged to be tilted upward with an inclination angle of 45°.

[0011] Optionally, the nozzle is threadedly connected to the outlet end of the feed pipe.

[0012] Optionally, the outlet end of the feed pipe is welded and fixed to the side wall of the tank.

[0013] Optionally, the airflow component includes a rotating shaft and fan blades, the upper end of the rotating shaft is connected to the output end of the driving motor, and the fan blades are provided in plurality and evenly distributed around the circumference of the rotating shaft, and the fan blades are located below the nozzle.

[0014] Optionally, the fan blades are curved blades.

[0015] Optionally, an exhaust pipe is provided on the top of the tank body, and an exhaust valve is provided on the exhaust pipe.

[0016] Optionally, the exhaust pipe is arranged vertically, and the middle part of the exhaust pipe is arranged in a serpentine structure.

[0017] The utility model has the beneficial effects:

[0018] 1. In the utility model, the reaction tank realizes uniform mixing and injection of the raw material liquid by setting up multiple feeding pipes and nozzles; the injection speed of the raw material liquid is increased by the booster pump; the airflow component driven by the driving motor generates an upward airflow, further refines the raw material droplets, stirs each raw material liquid, and helps to take away the heat and gas generated by the reaction, so that the injected raw material liquids can be fully mixed and evenly, effectively reducing the risk of crystals precipitating during the cyanohydrin production process and blocking the pipelines or valves of subsequent equipment.

[0019] 2. When the mixed raw material liquid is immersed in the fan blades, the driving motor drives the fan blades to rotate, which can stir the internal mixed raw material liquid, making it more evenly mixed, more efficient in reaction, and less likely to precipitate salt crystals. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the utility model;

[0021] Figure 2 Schematic diagram of the top view of the airflow component.

[0022] Figure markings: 1-tank body, 2-feeding pipe, 3-nozzle, 4-raw material tank, 5-boosting pump, 6-driving motor, 7-coupling, 8-rotating shaft, 9-fan blades, 10-exhaust pipe, 11-exhaust valve, 12-discharge port. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0024] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "opened," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0026] Example

[0027] A reaction tank for cyanohydrin production comprises a tank body 1, wherein a plurality of feed pipes 2 are circumferentially provided on the side wall of the tank body 1, wherein the inlet ends of the plurality of feed pipes 2 are connected to different raw material tanks 4, and the outlet ends of the plurality of feed pipes 2 are provided with nozzles 3, and the raw material liquids sprayed by the plurality of nozzles 3 intersect with each other. A booster pump 5 is provided between the feed pipes 2 and the raw material tank 4, and a drive motor 6 is provided on the top of the tank body 1, wherein the output end of the drive motor 6 extends into the tank body 1 and is connected to an airflow component in the tank body 1, and the drive motor 6 drives the airflow component to generate an upward airflow, and the airflow acts on the sprayed raw material liquid.

[0028] In this embodiment, Figure 1As shown, a discharge port 12 is provided at the lower side wall of the tank body 1, and a plurality of feed pipes 2 are provided circumferentially on the side wall of the tank body 1. The feed pipes 2 are used to transport the raw material liquid in different raw material tanks 4 into the reaction tank. The feed pipes 2 are made of suitable materials according to the different raw materials to be transported to avoid being corroded by the raw material liquid. The provision of multiple feed pipes 2 can ensure that the raw material liquid is sprayed in from multiple directions at the same time, which is conducive to the uniform mixing of the raw materials. A nozzle 3 is provided at the outlet end of each feed pipe 2. The raw material liquid sprayed by the nozzle 3 intersects in the tank body 1, so that the raw material liquid forms a staggered jet stream in the tank body 1, which further promotes the mixing and reaction of the raw materials. A booster pump 5 is provided between the feed pipe 2 and the raw material tank 4. The function of the booster pump 5 is to increase the pressure of the raw material liquid when it enters the feed pipe 2, thereby ensuring that the raw material liquid can be sprayed out of the nozzle 3 at a higher speed. , forming fine droplets or atomization effect, which is beneficial to the neutralization reaction. A driving motor 6 is provided on the top of the tank body 1, and the output end of the driving motor 6 extends into the tank body 1 and is connected to the airflow component. The driving motor 6 drives the airflow component to generate an upward airflow. The airflow acts on the sprayed raw material liquid. The airflow can further refine the raw material droplets and increase the contact area of ​​each raw material droplet, which is beneficial to the reaction. The airflow can form a disturbance on the raw material liquid sprayed from the tank body 1, so that the raw material liquids are further mixed, thereby reducing the risk of crystal precipitation. The airflow can also help to take away the heat and gas generated by the reaction in time, maintain the temperature and pressure in the tank body 1 stable, which is beneficial to the continuous progress of the reaction. The upward airflow can also slow down the descending speed of each raw material liquid, extend the mixing time of each raw material liquid, and make the mixing more uniform.

[0029] This reaction tank for reducing crystal precipitation during cyanohydrin production achieves uniform mixing and injection of the raw material liquid through the arrangement of multiple feed pipes 2 and nozzles 3; the injection speed of the raw material liquid is increased by the booster pump 5; the airflow component driven by the drive motor 6 generates an upward airflow, further refines the raw material droplets, stirs the raw material liquid and gas mixture, and helps to carry away the heat and gas generated by the reaction, effectively reducing the risk of crystal precipitation blocking the pipelines or valves of subsequent equipment during the cyanohydrin production process.

[0030] Furthermore, the raw material liquid sprayed by the multiple nozzles 3 intersects with the vertical center line of the tank body 1.

[0031] Specifically, the raw material liquids intersect at the vertical centerline of the tank 1. Liquids from different feed pipes 2 converge at this point, forming a concentrated mixing area. This concentrated mixing facilitates sufficient mixing, contact, and reaction between the raw material liquids, thereby improving reaction efficiency. Furthermore, the upward airflow further disperses and refines the raw material liquid jets intersecting at the vertical centerline. This airflow not only stirs the raw material liquid but also forms smaller droplets, increasing the contact area between the two liquids and facilitating the reaction.

[0032] Furthermore, the multiple nozzles 3 are arranged to be tilted upward, with an inclination angle of 45°.

[0033] Specifically, first, the upwardly inclined nozzle 3 is set so that the raw material liquid has not only horizontal momentum when spraying, but also upward momentum, which helps the raw material liquid to form a wider distribution in the tank body 1, rather than being limited to the area below the nozzle 3. Therefore, the raw material liquid can more evenly cover the entire interior of the tank body 1, promoting the mixing of the raw materials. Secondly, the inclination angle of 45° is neither too steep nor too flat, which can ensure that the raw material liquid has a certain horizontal diffusion ability when spraying, and at the same time can make full use of the upward airflow to drive the raw material liquid upward. In this way, the movement trajectory of the raw material liquid in the tank body 1 is more complex and varied, which is conducive to the progress of the reaction and the uniformity of mixing.

[0034] Furthermore, the nozzle 3 is threadedly connected to the outlet end of the feed pipe 2 .

[0035] Specifically, the threaded connection can ensure a firm connection between the nozzle 3 and the feed pipe 2 through the tight engagement of the internal and external threads, which is not easy to loosen, thereby ensuring the stability of the raw material liquid during the transportation process. Compared with other connection methods, the threaded connection has higher flexibility. When the nozzle 3 needs to be replaced or repaired, it can be easily disassembled and installed by loosening the threads without the need for complicated tools or equipment.

[0036] Furthermore, the outlet end of the feed pipe 2 is welded and fixed to the side wall of the tank body 1 .

[0037] Specifically, the welding fixation has high strength and can withstand greater pressure and vibration. The welding fixation can ensure that there is no gap at the connection between the feed pipe 2 and the tank body 1, thereby avoiding the leakage problem of the raw material liquid during the transportation process, ensuring the safety of the production environment and the effective use of raw materials. The welding fixation connection method makes the feed pipe 2 and the tank body 1 an integral structure, improves the stability and durability of the entire reaction tank, and reduces failures and downtime caused by loose or falling connections.

[0038] Furthermore, the airflow component includes a rotating shaft 8 and fan blades 9. The upper end of the rotating shaft 8 is connected to the output end of the driving motor 6. There are multiple fan blades 9 that are evenly distributed around the rotating shaft 8. The fan blades 9 are located below the nozzle 3.

[0039] Furthermore, the fan blades 9 are arc-shaped blades.

[0040] Specifically, such as Figure 2As shown, shaft 8 is connected to the output end of drive motor 6 via coupling 7, transmitting the motor's rotational power to fan blades 9. The design of shaft 8 must take into account factors such as strength, rigidity, and wear resistance to ensure stability and reliability even at high speeds. Fan blades 9 are the direct components for generating airflow. In this embodiment, three fan blades 9 are provided, evenly distributed around the circumference of shaft 8. They rotate as shaft 8 rotates. The fan blades have the same structure as the blades of current household electric fans. In this embodiment, fan blades 9 are located below nozzle 3, so that the airflow generated by the rotation of fan blades 9 can directly act on the ejected raw material liquid.

[0041] The working principle of the airflow component: When the drive motor 6 is started, it drives the rotating shaft 8 to rotate, and then drives the fan blades 9 to rotate. The fan blades 9 generate upward airflow during the rotation process. The airflow acts on the ejected raw material liquid, which plays a role in refining the droplets, stirring the raw material liquid and taking away heat, etc., which helps to evenly mix the raw material liquid and react, thereby reducing the risk of salt crystal precipitation.

[0042] After a period of time, when the mixed raw material liquid falls to the bottom of the tank body 1 until it submerges the fan blades 9, the driving motor 6 drives the fan blades 9 to rotate and can also stir the internal mixed raw material liquid, making it more evenly mixed, more efficient in the reaction, and less likely to precipitate salt crystals.

[0043] Furthermore, an exhaust pipe 10 is provided on the top of the tank body 1 , and an exhaust valve 11 is provided on the exhaust pipe 10 .

[0044] Furthermore, the exhaust pipe 10 is arranged vertically, and the middle portion of the exhaust pipe 10 is arranged in a serpentine structure.

[0045] Specifically, an exhaust pipe 10 is provided on the top of the tank body 1. This is for discharging the gas and heat generated during the reaction out of the tank body 1 in time to maintain the stability of the pressure and temperature in the tank body 1. The setting of the exhaust pipe 10 helps to prevent safety problems caused by excessive pressure in the tank and ensure that the reaction can proceed smoothly. An exhaust valve 11 is provided on the exhaust pipe 10. By adjusting the opening of the exhaust valve 11, the exhaust volume can be accurately controlled to achieve fine-tuning of the pressure in the tank. A component specifically used for treating exhaust gas is provided at the exhaust pipe 10 to prevent the exhaust gas from polluting the air or harming the human body. The component can be provided with a device with activated carbon or alkali. In addition, when emergency pressure relief or exhaust stop is required, the exhaust valve 11 can be quickly closed to ensure the safety of the reaction tank. The middle part of the exhaust pipe 10 is set to a serpentine structure. The serpentine structure can increase the length and surface area of ​​the exhaust pipe 10, thereby enhancing the cooling effect and condensation effect of the gas. During the reaction process, the high-temperature gas generated will be gradually cooled and condensed when passing through the serpentine exhaust pipe 10. In addition, the serpentine structure can also play a buffering and shock-absorbing role, reducing the impact and vibration of the tank body 1 caused by air flow fluctuations. Since the airflow acts upward on the raw material liquid, a small amount of raw material liquid may be discharged with the airflow during exhaust. Some of the raw material liquid is dangerous chemical raw materials. Therefore, in order to avoid the raw material liquid from being discharged with the airflow, a serpentine exhaust pipe 10 is set to deposit the small amount of raw material liquid that follows the airflow to the exhaust pipe 10.

[0046] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Based on the technical essence of the present invention and within the spirit and principles of the present invention, any simple modification, equivalent replacement and improvement of the above embodiment shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A reaction tank for cyanohydrin production, comprising a tank body (1), characterized in that: A plurality of feed pipes (2) are provided on the circumferential side wall of the tank body (1), the inlet ends of the plurality of feed pipes (2) are connected to different raw material tanks (4), the outlet ends of the plurality of feed pipes (2) are provided with nozzles (3), the raw material liquids ejected by the plurality of nozzles (3) intersect, a booster pump (5) is provided between the feed pipes (2) and the raw material tank (4), a drive motor (6) is provided on the top of the tank body (1), the output end of the drive motor (6) extends into the tank body (1) and is connected to an airflow component in the tank body (1), the drive motor (6) drives the airflow component to generate an upward airflow, and the airflow acts on the ejected raw material liquid.

2. A reaction tank for cyanohydrin production according to claim 1, characterized in that: The raw material liquid at the injection point of the multiple nozzles (3) intersects with the vertical center line of the tank body (1).

3. A reaction tank for cyanohydrin production according to claim 2, characterized in that, The multiple nozzles (3) are arranged tilted upwards, with an inclination angle of 45°.

4. A reaction tank for cyanohydrin production according to claim 1, characterized in that: The nozzle (3) is threadedly connected to the outlet end of the feed pipe (2).

5. The reaction tank for cyanohydrin production according to claim 1, characterized in that: The outlet end of the feed pipe (2) is welded and fixed to the side wall of the tank body (1).

6. The reaction tank for cyanohydrin production according to claim 1, characterized in that: The airflow component comprises a rotating shaft (8) and fan blades (9). The upper end of the rotating shaft (8) is connected to the output end of the drive motor (6). A plurality of fan blades (9) are provided and evenly distributed around the rotating shaft (8). The fan blades (9) are located below the nozzle (3).

7. A reaction tank for cyanohydrin production according to claim 6, characterized in that: The fan blades (9) are arc-shaped blades.

8. The reaction tank for cyanohydrin production according to claim 1, characterized in that: An exhaust pipe (10) is provided on the top of the tank body (1), and an exhaust valve (11) is provided on the exhaust pipe (10).

9. A reaction tank for cyanohydrin production according to claim 8, characterized in that: The exhaust pipe (10) is arranged vertically, and the middle portion of the exhaust pipe (10) is arranged in a serpentine structure.

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