Liquid fertilizer reactor

Abstract

The utility model discloses a kind of liquid fertilizer reaction kettle, it relates to liquid fertilizer processing technical field, including tank body, top cover and quick-release bottom cover;Three jacket cavities are formed from top to bottom between the inner wall and the outer wall of tank body, every two jacket cavities are sealed and cut off by partition, tank body's outer wall is correspondingly every jacket cavity place is provided with inlet pipe and outlet pipe and temperature sensor, the inside of tank body is provided with multistage stirring system, the synergistic effect of multistage stirring system is adopted in this design, material axial and radial mixing is sufficient, and it is unnecessary to high-speed stirring for a long time, and tank body is used with zoned temperature control jacket cooperation PID dynamic regulation, can accurately control each area temperature according to reaction stage, heat transfer oil is heated to prevent precipitation in lower jacket cavity in reaction initial stage, cooling water is passed to prevent volatilization in upper jacket cavity in reaction middle stage, to ensure reaction system temperature fluctuation temperature, make reaction time shorten, to further improve mixing uniformity.

Description

Technical Field

[0001] This utility model relates to the field of liquid fertilizer processing, and in particular to a liquid fertilizer reaction vessel. Background Technology

[0002] In the production of liquid fertilizers, the reactor is the core mixing and reaction equipment, and its performance directly affects product quality and production energy consumption. Currently, traditional liquid fertilizer reactors have the following key technical challenges: First, traditional reaction vessels mostly use a single stirring paddle (such as a straight blade paddle or a flat blade paddle), which makes it difficult to break the density stratification phenomenon of high-concentration liquid fertilizers. This causes the material to settle and clump at the bottom of the vessel, resulting in a final product composition uniformity deviation of more than 5%, which seriously affects the fertilizer application effect. Secondly, traditional reactors mostly use an integral jacket for heating or cooling, which has low heat transfer efficiency and cannot be dynamically adjusted according to the temperature requirements of different stages of the reaction. This results in temperature fluctuations of ±5℃ or more in the reaction system, which not only prolongs the reaction time but also easily causes fertilizer components to decompose, affecting product stability. To address the aforementioned problems, this utility model provides a liquid fertilizer reaction vessel. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a liquid fertilizer reactor, which solves the problems mentioned in the background section.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a liquid fertilizer reaction vessel, including a tank body, a top cover installed at the top of the tank body, and a quick-release bottom cover provided at the bottom of the tank body; The inner and outer walls of the tank are connected by three jacketed cavities from top to bottom. Each pair of jacketed cavities is sealed and separated by a partition. The outer wall of the tank is provided with an inlet pipe at the upper end of each jacketed cavity and an outlet pipe at the lower end of each jacketed cavity. Multiple temperature sensors are also embedded in the outer wall of the tank corresponding to each of the jacket cavities. The tank is equipped with a multi-stage stirring system.

[0005] As a further technical solution of this utility model, the multi-stage stirring system includes a drive motor installed on the top of the top cover and a main stirring shaft extending to the bottom of the tank. The top end of the main stirring shaft passes through the top cover and is fixed to the output end of the drive motor. The bottom end of the main stirring shaft is fixed to the inner bottom side wall of the tank by a bracket, and the main stirring shaft and the bracket are rotatably connected.

[0006] As a further technical solution of this utility model, the multi-stage stirring system also includes an inclined blade turbine blade installed on the upper end of the main stirring shaft, a three-layer frame-type wall scraper blade installed in the middle of the main stirring shaft, and a secondary stirring shaft connected to the lower end of the main stirring shaft through a sealed transmission box, on which a spiral belt stirring blade is provided.

[0007] As a further technical solution of this utility model, the sealed transmission box is provided with two transmission gears, which mesh with each other. One of the transmission gears is fixed at the lower end of the main stirring shaft, and the other transmission gear is fixed at the lower end of the auxiliary stirring shaft. The bottom end of the auxiliary stirring shaft extends through the sealed transmission box into its interior and is rotatably connected thereto. The main stirring shaft is rotatably connected to the sealed transmission box.

[0008] As a further technical solution of this utility model, the quick-release bottom cover adopts a quick-release manhole, and a discharge pipe is connected to the middle of the bottom end of the quick-release bottom cover, and a valve is installed on the discharge pipe. The lower outer wall of the tank has multiple circular support legs.

[0009] As a further technical solution of this utility model, the inner surface of the quick-release bottom cover and the outer surface of the main stirring shaft are both coated with a nano-hydrophobic coating to prevent viscous materials from adhering.

[0010] As a further technical solution of this utility model, both the inlet pipe and the outlet pipe are connected to the jacket cavity, and both the inlet pipe and the outlet pipe are equipped with an electric control valve.

[0011] This utility model provides a liquid fertilizer reaction vessel, which has the following advantages compared with the prior art: 1. The liquid fertilizer reactor designed in this paper adopts the synergistic effect of a multi-stage stirring system, which ensures thorough axial and radial mixing of materials, and eliminates the need for long-term high-speed stirring, thereby reducing stirring power and achieving energy saving and consumption reduction.

[0012] 2. The liquid fertilizer reactor designed in this paper adopts a zoned temperature control jacket with PID dynamic adjustment. It can accurately control the temperature of each zone according to the reaction stage. In the early stage of the reaction, the lower jacket cavity is heated by heat transfer oil to prevent sedimentation. In the middle stage of the reaction, the upper jacket cavity is heated by cooling water to prevent volatilization. This ensures that the temperature of the reaction system is stable and the reaction time is shortened, thereby further improving the mixing uniformity.

[0013] 3. The liquid fertilizer reactor designed in this paper adopts a quick-release bottom cover and discharge pipe combination at the bottom, which does not affect the discharge and facilitates thorough cleaning of the inside of the tank later. Combined with the design of nano-liquid-repellent coating, it can prevent material adhesion, reduce cleaning time, and improve the service life of the equipment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a liquid fertilizer reactor; Figure 2 This is a schematic diagram of the internal structure of a liquid fertilizer reactor; Figure 3 This is an internal front view of a liquid fertilizer reactor; Figure 4 This is a schematic diagram of a multi-stage stirring system in a liquid fertilizer reactor; Figure 5 This is a schematic diagram of the internal structure of the transmission box in a liquid fertilizer reactor.

[0015] In the diagram: 1. Tank body; 11. Inlet pipe; 12. Outlet pipe; 13. Temperature sensor; 14. Jacketed cavity; 2. Top cover; 3. Quick-release bottom cover; 4. Discharge pipe; 5. Support leg; 6. Main stirring shaft; 61. Inclined blade turbine propeller; 62. Frame-type wall scraper propeller; 63. Auxiliary stirring shaft; 64. Spiral belt type stirring propeller; 65. Drive motor; 66. Sealed transmission box; 67. Transmission gear. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-5 This utility model provides a liquid fertilizer reactor technical solution: a liquid fertilizer reactor includes a tank body 1, a top cover 2 installed at the top of the tank body 1, and a detachable quick-release bottom cover 3 at the bottom of the tank body 1. The quick-release bottom cover 3 adopts a quick-release manhole and is designed with a butterfly-shaped end cap. An airtight sealing ring (made of corrosion-resistant fluororubber) is embedded on the edge of the bottom cover to ensure the sealing performance of the reactor body. A discharge pipe 4 is connected to the middle of the bottom of the quick-release bottom cover 3, and a valve is installed on the discharge pipe 4 to facilitate discharge under normal conditions. Multiple support legs 5 are distributed in a circular shape on the lower outer wall of the tank body 1. The support legs 5 are made of stainless steel and are used to support the entire reactor body. The inner surface of the quick-release bottom cover 3 and the outer surface of the main stirring shaft 6 are coated with a nano-liquid-repellent coating, which can effectively prevent the adhesion of viscous materials and reduce the difficulty of cleaning. In addition, it should be added that the nano-liquid-repellent coating can also be sprayed on the main stirring shaft 6, the auxiliary stirring shaft 63 and each blade to reduce the adhesion of viscous materials and improve the efficiency of subsequent cleaning. Three jacketed cavities 14 are formed from top to bottom between the inner and outer walls of tank 1. Each pair of jacketed cavities 14 is sealed and isolated by a partition to prevent cross-flow of heat transfer medium between different areas. A water inlet pipe 11 is installed at the upper end of each jacketed cavity 14 on the outer wall of tank 1, and a water outlet pipe 12 is installed at the lower end of each jacketed cavity 14 on the outer wall of tank 1. Both the water inlet pipe 11 and the water outlet pipe 12 are connected to the jacketed cavities 14, and each water inlet pipe 11 and the water outlet pipe 12 is equipped with a DN25 solenoid valve. Multiple temperature sensors 13, such as two or three, are also embedded in the cavity 14. The sensors are PT100 platinum resistance sensors. The probes of the temperature sensors extend into the inner side of the jacket cavity 14 to detect the material temperature in the corresponding area in real time. The reactor is also equipped with a PID controller, Siemens S7-200SMART. The signal input terminal of the PID controller is electrically connected to the temperature sensor 13, and the signal output terminal is electrically connected to the electric control valve. The flow rate of the heat transfer medium (heat transfer oil or cooling water) in each jacket cavity 14 can be dynamically adjusted according to the temperature feedback. The tank 1 is equipped with a multi-stage stirring system. The multi-stage stirring system includes a drive motor 65 (model Y132M-4, power 7.5kW) installed on the top of the top cover 2, and a main stirring shaft 6 extending to the bottom of the tank 1. The top of the main stirring shaft 6 passes through the top cover 2 (sealed by a mechanical seal) and is fixed to the output end of the drive motor 65. The bottom of the main stirring shaft 6 is fixed to the inner bottom side wall of the tank 1 by a bracket, and the main stirring shaft 6 and the bracket are rotatably connected. The multi-stage stirring system also includes an inclined blade turbine 61 (blade inclination angle 45°) installed on the upper end of the main stirring shaft 6 to generate strong axial flow and break up material density stratification. A three-layer frame scraper 62 is also installed in the middle of the main stirring shaft 6. The blade of the scraper is made of flexible polytetrafluoroethylene, and the blade edge is attached to the inner wall of the tank to remove the inner wall deposits and promote heat exchange. The lower end of the main stirring shaft 6 is also connected to the auxiliary stirring shaft 63 via a sealed transmission box 66. The auxiliary stirring shaft 63 is equipped with a spiral belt stirring paddle 64. The sealed transmission box 66 contains two transmission gears 67 that mesh with each other. One transmission gear 67 is fixed to the lower end of the main stirring shaft 6, and the other transmission gear 67 is fixed to the lower end of the auxiliary stirring shaft 63. The bottom end of the auxiliary stirring shaft 63 extends through the sealed transmission box 66 (sealed by a mechanical seal) and rotates within it. The main stirring shaft 6 and the sealed transmission box 66 are rotatably connected (sealed by a mechanical seal). In addition, the auxiliary stirring shaft 63 rotates in the opposite direction to the main stirring shaft 6 (reverse transmission is achieved through the meshing of two transmission gears 67). The speed ratio of the main stirring shaft 6 and the auxiliary stirring shaft 63 is 1:1.5. Furthermore, when the speed of the main stirring shaft 6 is 100 r / min, the speed of the auxiliary stirring shaft 63 is 150 r / min. The spiral ribbon stirring paddle 64 can push the sediment at the bottom of the vessel upward to circulate and eliminate the mixing dead zone.

[0018] The working principle of this utility model is as follows: When in use, open the feed port on the top cover 2, add the liquid fertilizer raw materials into the tank 1 in proportion, close the top cover 2 and seal it; Then, start the drive motor 65 to drive the main stirring shaft 6 to rotate. The main stirring shaft 6 drives the inclined blade turbine 61 (to generate axial flow to break up density stratification) and the frame scraper 62 to rotate (to remove the deposits on the inner wall of the tank and promote heat exchange). At the same time, the main stirring shaft 6 drives the auxiliary stirring shaft 63 to rotate in the opposite direction through the transmission gear 67 in the sealed transmission box 66, and the spiral belt stirring paddle 64 pushes the sediment at the bottom of the vessel to circulate upward, eliminating the mixing dead zone; During the stirring process, the temperature sensor 13 is used to detect the material temperature in the corresponding area of ​​each jacket cavity 14 in real time, and the signal is transmitted to the PID controller. If heating is required in the initial stage of the reaction (i.e. to prevent the bottom material from settling), the PID controller controls the electric valve of the water inlet pipe 11 of the lower jacket cavity 14 to open and introduce heat transfer oil (e.g., at a temperature of 60°C). After heating is completed, the oil is discharged through the water outlet pipe 12. If cooling is required during the middle stage of the reaction (i.e. to prevent the upper material from evaporating), the PID controller controls the electric valve of the water inlet pipe 11 of the upper jacket cavity 14 to open, and cooling water (e.g., at a temperature of 25°C) is introduced. After cooling is completed, the water is discharged through the water outlet pipe 12. During the entire reaction process, the material temperature fluctuation is controlled within ±1°C. After the reaction is complete, open the ball valve on the discharge pipe 4 to discharge the liquid fertilizer. After the discharge is complete, open the quick-release bottom cover 3. Due to the anti-adhesion effect of the nano hydrophobic coating, there is no obvious material residue on the bottom of the vessel and the surface of the stirring shaft. It only needs to be rinsed with water for 3 to 5 minutes to complete the cleaning. The cleaning time is shortened by 60% compared with the traditional vessel.

[0019] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. A liquid fertilizer reaction vessel, comprising a tank (1), characterized in that, The top of the tank (1) is fitted with a top cover (2), and the bottom of the tank (1) is fitted with a quick-release bottom cover (3). The inner wall and outer wall of the tank (1) are formed with three jacketed cavities (14) from top to bottom. Each pair of jacketed cavities (14) is sealed and separated by a partition. The outer wall of the tank (1) is provided with a water inlet pipe (11) at the upper end of each jacketed cavity (14), and the outer wall of the tank (1) is provided with a water outlet pipe (12) at the lower end of each jacketed cavity (14). Multiple temperature sensors (13) are also embedded in the outer wall of the tank (1) at each of the jacket cavities (14). The tank (1) is equipped with a multi-stage stirring system inside.

2. The liquid fertilizer reaction vessel according to claim 1, characterized in that, The multi-stage stirring system includes a drive motor (65) installed on the top of the top cover (2) and a main stirring shaft (6) extending to the bottom of the tank (1). The top end of the main stirring shaft (6) passes through the top cover (2) and is fixed to the output end of the drive motor (65). The bottom end of the main stirring shaft (6) is fixed to the inner bottom side wall of the tank (1) by a bracket, and the main stirring shaft (6) and the bracket are rotatably connected.

3. The liquid fertilizer reaction vessel according to claim 1, characterized in that, The multi-stage stirring system also includes a slanted blade turbine (61) installed on the upper end of the main stirring shaft (6), a three-layer frame scraper (62) installed in the middle of the main stirring shaft (6), and a secondary stirring shaft (63) connected to the lower end of the main stirring shaft (6) via a sealed transmission box (66). A spiral belt stirring blade (64) is provided on the secondary stirring shaft (63).

4. A liquid fertilizer reaction vessel according to claim 3, characterized in that, The sealed transmission box (66) is equipped with two transmission gears (67), which mesh with each other. One of the transmission gears (67) is fixed to the lower end of the main stirring shaft (6), and the other transmission gear (67) is fixed to the lower end of the auxiliary stirring shaft (63). The bottom end of the auxiliary stirring shaft (63) extends through the sealed transmission box (66) into its interior and is rotatably connected thereto. The main stirring shaft (6) and the sealed transmission box (66) are rotatably connected.

5. A liquid fertilizer reaction vessel according to claim 1, characterized in that, The quick-release bottom cover (3) adopts a quick-release manhole, and the bottom center of the quick-release bottom cover (3) is connected to a discharge pipe (4), and a valve is installed on the discharge pipe (4); The lower outer wall of the tank (1) has multiple circular legs (5).

6. A liquid fertilizer reaction vessel according to claim 5, characterized in that, The inner surface of the quick-release bottom cover (3) and the outer surface of the main stirring shaft (6) are both coated with a nano-hydrophobic coating to prevent viscous materials from adhering.

7. A liquid fertilizer reaction vessel according to claim 1, characterized in that, The inlet pipe (11) and outlet pipe (12) are both connected to the jacket cavity (14), and both the inlet pipe (11) and outlet pipe (12) are equipped with electrically controlled valves.

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