Ethyl maltol production hydrolysis and neutralization kettle
By introducing a wall-scraping agitator and a simplified inlet pipe connection structure into the ethyl maltol production reactor, the problem of corrosion from residues on the inner wall of the reactor was solved, extending equipment life and improving production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBEI TIANLIHAI FLAVORS & FRAGRANCES CO LTD
- Filing Date
- 2025-06-19
- Publication Date
- 2026-06-16
AI Technical Summary
In existing ethyl maltol production neutralization reactors, hydrolysis reaction residues easily adhere to the inner wall of the reactor, leading to corrosion, affecting equipment lifespan, and increasing the frequency of cleaning and maintenance.
A neutralization vessel with a wall-scraping and stirring assembly was designed. The scraper and stirring rod are driven by a rotating rod and combined with gear meshing to achieve cleaning and scraping of the inner wall of the vessel. The installation process of the inlet pipe is simplified by the docking assembly.
It effectively prevents the accumulation of residues on the inner wall of the reactor, extends equipment life, improves reaction efficiency, reduces the frequency of cleaning and maintenance, and enhances the efficiency and reliability of the feeding process.
Smart Images
Figure CN224358442U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of neutralization reactor technology, and in particular to a hydrolysis neutralization reactor for the production of ethyl maltol. Background Technology
[0002] The neutralization of ethyl maltol hydrolysis products is carried out using ammonia gas. The hydrolyzed material is pumped into a neutralization vessel at 95–105°C, and ammonia gas is introduced to adjust the pH to 2.5–3.0 while controlling the temperature below 60°C. After neutralization, the mixture is allowed to stand and separate into layers. The lower layer contains the target product, while the upper layer contains ammonium chloride and a small amount of other products. This method utilizes the endothermic vaporization of ammonia gas to buffer the exothermic reaction, making the reaction more stable and safe. At the same time, the generated ammonium chloride can be recycled, reducing energy consumption and the pressure of waste salt treatment, thus providing good economic and environmental benefits.
[0003] The hydrolysis neutralization vessel in ethyl maltol production is used to neutralize residual acids and alkalis after the hydrolysis reaction, stabilize product properties, and improve subsequent extraction efficiency. This vessel is typically made of corrosion-resistant stainless steel and is equipped with a stirring device, a liquid nitrogen inlet, and a temperature and pH monitoring system. The stirring system ensures uniform reaction, while the temperature and pH monitoring system monitors the temperature and neutralization process in real time. The neutralization vessel has a compact structure, is easy to operate and clean, and is suitable for continuous or batch production.
[0004] Existing neutralization reactors are characterized by strong corrosion resistance, precise temperature control, and uniform stirring, making them suitable for various neutralization reaction processes. They are also compact in structure and easy to clean and operate. However, during the hydrolysis reaction, residues still adhere to the inner wall of the reactor, causing corrosion and thus affecting the equipment's lifespan or increasing the frequency of cleaning and maintenance. To address these issues, a hydrolysis neutralization reactor for ethyl maltol production is proposed. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a hydrolysis neutralization reactor for the production of ethyl maltol, which aims to improve the problem in the prior art where hydrolysis reaction residues adhere to the inner wall of the reactor, causing corrosion, affecting equipment lifespan, or increasing the frequency of cleaning and maintenance.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] An ethyl maltol production hydrolysis and neutralization reactor includes a reactor body and an inlet pipe. A reactor cover is provided on the top of the reactor body, and a rotating rod is rotatably connected inside the reactor cover. A wall-scraping and stirring assembly is installed at the bottom of the rotating rod. An addition pipe is provided on the side of the reactor body, and a docking assembly is installed inside the addition pipe. The inlet pipe is located inside the docking assembly. The wall-scraping and stirring assembly includes a rotating plate, which is fixedly connected to the bottom of the rotating rod. A rotating frame is rotatably connected inside the rotating plate, and a stirring rod is fixedly connected inside the rotating frame. A scraper is fixedly connected to the side of the rotating frame.
[0008] As a further description of the above technical solution:
[0009] The bottom of the lid is fixedly connected to a gear one, and the top of the rotating frame is fixedly connected to a gear two, with the gear one and the gear two meshing with each other;
[0010] As a further description of the above technical solution:
[0011] A motor is installed on the top of the vessel body, and the rotating rod is fixedly connected to the output end of the motor.
[0012] As a further description of the above technical solution:
[0013] The docking assembly includes a docking plate, which is fixedly connected inside the adding tube. A fixing plate is fixedly connected inside the adding tube. A spring telescopic rod is fixedly connected to the side of the fixing plate. A pressure plate is fixedly connected to the end of the spring telescopic rod. A locking block is fixedly connected to the side of the input tube.
[0014] As a further description of the above technical solution:
[0015] The docking plate has a sliding groove inside, and the locking block is slidably connected inside the sliding groove;
[0016] As a further description of the above technical solution:
[0017] The docking plate has a slot inside, and the locking block engages with the slot.
[0018] As a further description of the above technical solution:
[0019] A protective tube is fixedly connected to the end of the input tube, and the protective tube is disposed inside the docking plate, the fixing plate and the pressure plate;
[0020] As a further description of the above technical solution:
[0021] The gear is rotatably connected to the outside of the rotating rod, and the scraping surface of the scraper is in contact with the inner wall of the kettle lid.
[0022] This utility model has the following beneficial effects:
[0023] 1. In this utility model, the rotating rod driven by the motor drives the rotating frame to rotate, so that the stirring rod and the scraper revolve around the rotating rod as the center, and at the same time, they rotate around the rotating frame under the cooperation of gear one and gear two. This allows the stirring device to uniformly stir the reactants while continuously scraping off the residues attached to the inner wall of the vessel, avoiding accumulation and corrosion, improving reaction efficiency, effectively extending the service life of the equipment, and reducing the frequency of cleaning and maintenance.
[0024] 2. In this utility model, the locking block of the input tube is slid into the groove and rotated to align with the groove. Under the pressing action of the spring telescopic rod on the pressure plate, the locking block is stably locked into the groove, realizing the quick and stable connection between the input tube and the adding tube. The installation process does not require complicated tools, the operation is convenient, and it can significantly improve the efficiency and reliability of the feeding process of the neutralization reactor and reduce human operation errors. Attached Figure Description
[0025] Figure 1 This is a three-dimensional schematic diagram of a hydrolysis and neutralization reactor for the production of ethyl maltol proposed in this utility model;
[0026] Figure 2 This is a schematic diagram of the structure of the lid of the hydrolysis and neutralization reactor for the production of ethyl maltol proposed in this utility model;
[0027] Figure 3 This is a schematic diagram of the gear one in the hydrolysis and neutralization reactor for the production of ethyl maltol proposed in this utility model;
[0028] Figure 4 This is a schematic diagram of the connecting plate of the hydrolysis and neutralization reactor for the production of ethyl maltol proposed in this utility model;
[0029] Figure 5 This is a schematic diagram of the input pipe of the hydrolysis and neutralization reactor for the production of ethyl maltol proposed in this utility model.
[0030] Legend:
[0031] 1. Kettle body; 2. Kettle lid; 3. Rotating rod; 4. Adding pipe; 5. Input pipe; 6. Rotating plate; 7. Rotating frame; 8. Stirring rod; 9. Scraper; 10. Gear 1; 11. Gear 2; 12. Motor; 13. Connecting plate; 14. Fixing plate; 15. Spring telescopic rod; 16. Pressure plate; 17. Locking block; 18. Slide groove; 19. Locking groove; 20. Protective tube. Detailed Implementation
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0033] Reference Figures 1-3This utility model provides an embodiment of an ethyl maltol production hydrolysis and neutralization reactor, comprising a reactor body 1 and an input pipe 5. A reactor cover 2 is provided on the top of the reactor body 1, and a rotating rod 3 is rotatably connected inside the reactor cover 2. A wall-scraping stirring assembly is installed at the bottom of the rotating rod 3. An addition pipe 4 is provided on the side of the reactor body 1, and a docking assembly is installed inside the addition pipe 4. The input pipe 5 is located inside the docking assembly, with its end only inside the addition pipe 4 and not extending into the reactor body 1, thus avoiding conflict with the wall-scraping stirring assembly. The wall-scraping stirring assembly includes a rotating plate 6, which is fixedly connected to the bottom of the rotating rod 3. Other structures are connected to the rotating rod 3 using the rotating plate 6. A rotating frame 7 is rotatably connected inside the rotating plate 6. Rotating the rotating plate 6 causes the rotating frame 7 to rotate. A stirring rod 8 is fixedly connected inside the rotating frame 7, and a scraper 9 is fixedly connected to the side of the rotating frame 7. The rotating frame 7 rotates synchronously with the stirring rod 8 and the scraper 9. Gear 10 is fixedly connected to the bottom of the vessel lid 2, and gear 11 is fixedly connected to the top of the rotating frame 7. Gear 10 and gear 11 mesh with each other. When the rotating frame 7 rotates around the rotating rod 3, the engagement of gear 10 and gear 11 causes the rotating frame 7 to rotate around itself. A motor 12 is installed on the top of the vessel body 1, and the rotating rod 3 is fixedly connected to the output end of the motor 12. The motor 12 is used to control and drive the rotating rod 3 to rotate.
[0034] Reference Figure 1 , Figure 4 and Figure 5 The docking assembly includes a docking plate 13, which is fixedly connected inside the adding tube 4. The docking plate 13 is used to connect the adding tube 4 and the input tube 5. A fixing plate 14 is fixedly connected inside the adding tube 4. A spring telescopic rod 15 is fixedly connected to the side of the fixing plate 14. The spring telescopic rod 15 is mainly composed of a spring and a telescopic rod, which is existing technology and will not be described in detail. A pressure plate 16 is fixedly connected to the end of the spring telescopic rod 15. The pressure generated by the cooperation between the fixing plate 14 and the spring telescopic rod 15 causes the pressure plate 16 to move towards the docking plate 13. A locking block 17 is fixedly connected to the side of the input tube 5. A sliding groove 18 is opened inside the docking plate 13. The locking block 17 is slidably connected inside the sliding groove 18 and enters the docking plate 13 from the sliding groove 18. A locking groove 19 is opened inside the docking plate 13. The locking block 17 and the locking groove 19 are locked together. The pressure plate 16 moves towards the docking plate 13 to lock the locking block 17 into the locking groove 19.
[0035] Reference Figures 3-5A protective tube 20 is fixedly connected to the end of the input pipe 5. The protective tube 20 is located inside the docking plate 13, the fixing plate 14, and the pressure plate 16. By setting the protective tube 20, the structure outside the protective tube 20 is covered when liquid ammonia is input. Gear 10 is rotatably connected to the outside of the rotating rod 3. When the rotating rod 3 rotates, gear 10 moves, and the scraping surface of scraper 9 contacts the inner wall of the vessel cover 2. Scraper 9 rotates to scrape away the residue on the inner wall of the neutralizing vessel.
[0036] Working principle: The starting motor 12 drives the rotating rod 3 to rotate. The rotating rod 3 controls the rotating frame 7 to rotate through the rotating plate 6. The rotating frame 7, carrying the stirring rod 8 and scraper 9, revolves around the rotating rod 3. With the cooperation of gear 10 and gear 21, the rotating frame 7, stirring rod 8 and scraper 9 revolve around the rotating frame 7 while rotating on their own axis. This uniformly stirs and neutralizes the reactants in the reactor while scraping off the residues attached to the inner wall of the reactor body 1, improving reaction efficiency, extending equipment life, and reducing the frequency of cleaning and maintenance.
[0037] Slide the locking block 17 of the input pipe 5 into the groove 18 of the docking plate 13, then rotate the input pipe 5 to align the locking block 17 with the groove 19. With the cooperation of the pressure applied by the spring telescopic rod 15 to the pressure plate 16, the pressure plate 16 is forced to move towards the docking plate 13, locking the locking block 17 into the groove 19, thus realizing a stable and quick docking installation of the input pipe 5 and the adding pipe 4, improving work efficiency.
[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A hydrolysis and neutralization reactor for the production of ethyl maltol, comprising a reactor body (1) and an inlet pipe (5), characterized in that: The top of the vessel body (1) is provided with a vessel cover (2), and a rotating rod (3) is rotatably connected inside the vessel cover (2). A wall scraping and stirring assembly is installed at the bottom of the rotating rod (3). An adding pipe (4) is provided on the side of the vessel body (1). A docking assembly is installed inside the adding pipe (4). The input pipe (5) is located inside the docking assembly. The wall-scraping stirring assembly includes a rotating plate (6), which is fixedly connected to the bottom of the rotating rod (3). A rotating frame (7) is rotatably connected inside the rotating plate (6), and a stirring rod (8) is fixedly connected inside the rotating frame (7). A scraper (9) is fixedly connected to the side of the rotating frame (7).
2. The ethyl maltol production hydrolysis neutralization reactor according to claim 1, characterized in that: The bottom of the lid (2) is fixedly connected to a gear one (10), and the top of the rotating frame (7) is fixedly connected to a gear two (11). The gear one (10) and the gear two (11) mesh with each other.
3. The ethyl maltol production hydrolysis neutralization reactor according to claim 1, characterized in that: A motor (12) is installed on the top of the vessel body (1), and the rotating rod (3) is fixedly connected to the output end of the motor (12).
4. The ethyl maltol production hydrolysis neutralization reactor according to claim 1, characterized in that: The docking assembly includes a docking plate (13), which is fixedly connected inside the adding tube (4). A fixing plate (14) is fixedly connected inside the adding tube (4). A spring telescopic rod (15) is fixedly connected to the side of the fixing plate (14). A pressure plate (16) is fixedly connected to the end of the spring telescopic rod (15). A locking block (17) is fixedly connected to the side of the input tube (5).
5. The ethyl maltol production hydrolysis neutralization reactor according to claim 4, characterized in that: The docking plate (13) has a groove (18) inside, and the locking block (17) is slidably connected inside the groove (18).
6. The ethyl maltol production hydrolysis neutralization reactor according to claim 4, characterized in that: The docking plate (13) has a slot (19) inside, and the locking block (17) is engaged with the slot (19).
7. The ethyl maltol production hydrolysis neutralization reactor according to claim 4, characterized in that: The end of the input pipe (5) is fixedly connected to a protective pipe (20), which is located inside the docking plate (13), the fixing plate (14) and the pressure plate (16).
8. The ethyl maltol production hydrolysis neutralization reactor according to claim 2, characterized in that: The gear 1 (10) is rotatably connected to the outside of the rotating rod (3), and the scraping surface of the scraper (9) is in contact with the inner wall of the lid (2).