Glyphosate hydrolysis kettle

Abstract

The application discloses a glyphosate hydrolysis kettle, which comprises a reaction kettle, a feeding hopper and a discharging pipe, a partition plate is connected in the reaction kettle, the partition plate divides the reaction kettle into a reaction cavity and a cooling cavity, rotating holes are arranged on the upper and lower sides in the reaction cavity, a rotating pipe is inserted between the two rotating holes, a row of cooling stirring pieces is connected on the two sides of the rotating pipe, and a material containing and dispersing piece is connected above the outer side of the rotating pipe. The application has the following advantages: the cooling liquid is sent into the rotating pipe, and the cooling liquid enters into the two rows of cooling stirring pieces and the spiral pipe in sequence, so that the large amount of heat generated in the glyphosate acidolysis reaction is effectively relieved, the temperature environment in the reaction kettle is maintained to be relatively stable, and the hydrolysis efficiency is improved; in addition, the material can be uniformly dispersed by the material containing and dispersing piece, and the mixing reaction is facilitated.

Description

Technical Field

[0001] This invention relates to the field of glyphosate production technology, and in particular to a glyphosate hydrolysis reactor. Background Technology

[0002] To address the technical problem of requiring large amounts of alkaline solution in the existing route for synthesizing glyphosate via iminodiacetonitrile, some manufacturers have improved the synthesis process of glyphosate. They have added potassium permanganate or potassium dimanganate as a catalyst to a hydrochloric acid solution, mixed thoroughly, and heated to 40–60°C. Iminodiacetonitrile is then slowly added over 1–3 hours, and the mixture is kept at this temperature for 1–2 hours. The temperature is then raised to 80–95°C and kept at this temperature for another 1–2 hours to obtain an iminodiacetic acid solution or its hydrochloride salt. The catalyst is then removed by filtration, and the filtrate is dehydrated and reacted with phosphorous acid and formaldehyde in the presence of hydrochloric acid to produce crude glyphosate and wastewater containing ammonium chloride. The above-mentioned bisglyphosate preparation process reduces liquid alkali consumption by more than 80%, and also produces ammonium chloride as a byproduct. At the same time, the wastewater volume is greatly reduced, and the generated wastewater can be effectively treated, which has high economic and environmental benefits. However, this bisglyphosate acid hydrolysis process is a strongly exothermic reaction, which will generate a large amount of heat in the reaction vessel in a short period of time. In addition, the entire process requires a large amount of hydrochloric acid solution. The temperature inside the reaction vessel is high. In the high-temperature environment, a large amount of hydrogen chloride gas will violently overflow, causing a sharp rise in gas pressure. The generated heat cannot be discharged in time, which is not conducive to the acid hydrolysis reaction and is also not conducive to safe production.

[0003] An existing application (CN201520233103.2) discloses an improved diglyphosate hydrolysis system. This system includes an acid hydrolysis reactor body with a cooling coil inside. A coolant storage tank is located at the inlet of the cooling coil, and a chiller is located at the outlet. The chiller outlet is connected to the coolant storage tank inlet. A quantitative addition tank for reactants is located on the upper left side of the reactor body. A gas-phase condenser is connected to the upper right side of the reactor body, and this condenser is connected to a gas buffer tank, which in turn is connected to a hydrochloric acid absorption tower. The condensate outlet of the gas-phase condenser extends into the reactor body via a pipeline. While this application utilizes the cooling coil to absorb the large amount of heat generated during acid hydrolysis, the coil only contacts the outer surface of the raw materials, limiting its effectiveness in absorbing heat generated during reaction. Furthermore, when adding raw materials, they are typically added directly to the reactor, causing some non-liquid materials (such as iminodiacetonitrile) to fall into the same spot, preventing even distribution within the liquid materials and reducing reaction efficiency. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a glyphosate hydrolysis reactor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A glyphosate hydrolysis reactor includes a reaction vessel, a feed hopper, and a discharge pipe. A partition is connected inside the reaction vessel, dividing the reaction vessel into a reaction chamber and a cooling chamber. Rotating holes are provided on both the upper and lower sides of the reaction chamber. A rotating pipe is inserted between two rotating holes. A row of cooling and stirring components is connected on both sides of the rotating pipe. A material dispersing component is connected above and outside the rotating pipe.

[0006] Preferably, a spiral coil is provided in the cooling chamber, with the outer end of the spiral coil passing through the side wall of the cooling chamber and the inner end of the spiral coil connected to a vertical pipe. The rotating pipe is inserted into the vertical pipe, and coolant is delivered to the spiral coil through the rotating pipe to reduce the stability in the cooling chamber and thus reduce the temperature in the reaction chamber.

[0007] Preferably, the material dispersing component includes a material tray, with a dispersing platform connected to the upper center of the material tray. An annular groove is formed between the dispersing platform and the material tray, and discharge holes are evenly distributed in the annular groove. Raw materials are fed into the reactor through a feed hopper. The raw materials falling from the feed hopper land on the dispersing platform and then fall into the annular groove along the dispersing platform. The rotating tube drives the dispersing platform to rotate, thereby evenly dispersing and feeding the raw materials, which facilitates the mixing and reaction.

[0008] Preferably, the cooling and stirring component is a U-shaped tube, with both ends of the U-shaped tube connected to the rotating tube. The U-shaped tube can increase the contact area with the raw material, thereby improving the cooling efficiency.

[0009] Preferably, a set of partitions are connected from top to bottom inside the rotating tube, with each partition located between the two openings of the U-shaped tube.

[0010] Preferably, a drive device is connected to the upper side of the reactor. The drive device drives the rotating tube through a transmission mechanism. The rotating tube drives the cooling and stirring component to rotate, thereby cooling the material while stirring.

[0011] Preferably, the transmission mechanism includes a driving wheel connected to the drive shaft of the driving device, and the driving wheel drives a driven wheel via a transmission belt, with the driven wheel connected to the rotating tube.

[0012] Preferably, a water inlet pipe is inserted into the upper opening of the rotating tube, and the water inlet pipe is connected to the top of the reactor through a support frame, so as to deliver coolant into the rotating tube.

[0013] Preferably, an annular groove is provided on the inner side of each of the rotating holes, and an annular limiting plate is rotatably connected in each annular groove. The annular limiting plate is sleeved and fixed on the outer side of the rotating tube, and the rotating tube is limited to rotate within the rotating hole by the annular limiting plate.

[0014] The advantages of this invention are as follows: The bisglyphosate hydrolysis reactor provided by this invention effectively alleviates the large amount of heat generated in the bisglyphosate acid hydrolysis reaction by supplying coolant into the rotating tube, and the coolant sequentially enters the two rows of cooling stirring elements and the spiral coil, thus maintaining a relatively stable temperature environment in the reactor and helping to improve the hydrolysis efficiency; in addition, the material dispersing element can evenly distribute the material, which is convenient for mixing and reaction. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the principle structure of a glyphosate hydrolysis reactor provided by the present invention; Figure 2 This is a cross-sectional schematic diagram of a glyphosate hydrolysis reactor. Detailed Implementation

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

[0017] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0018] like Figure 1 and Figure 2 As shown, the present invention provides a glyphosate hydrolysis reactor, including a reaction vessel 1, a feed hopper 2, and a discharge pipe. The material is fed into the reaction vessel 1 through the feed hopper 2, and the reacted material is discharged through the discharge pipe. The discharge pipe is not shown in the figure due to the angle.

[0019] A partition 3 is connected inside the reactor 1, which divides the reactor 1 into a reaction chamber 4 and a cooling chamber 5. Rotating holes are provided on both the upper and lower sides of the reaction chamber 4. A rotating tube 6 is inserted between the two rotating holes. There is a sealing structure between the rotating holes and the rotating tube 6. The sealing structure is existing technology and prevents leakage.

[0020] An annular limiting groove is provided in each rotating hole, and an annular limiting plate 4.1 is rotatably connected in each annular limiting groove. The annular limiting plate 4.1 is sleeved and fixed on the outside of the rotating tube 6, so that the rotating tube 6 is limited to rotating within the rotating hole.

[0021] A drive unit 9 is connected to the upper side of the reactor 1. The drive unit 9 includes a matching motor and a reducer. The drive unit 9 drives the rotating tube 6 through a transmission mechanism. The transmission mechanism includes a drive wheel 10, which is connected to the drive shaft of the drive unit 9. The drive wheel 10 drives the driven wheel 12 through a transmission belt 11. The driven wheel 12 has a mounting through hole. The driven wheel 12 is sleeved and fixed to the outside of the rotating tube 6 through the mounting through hole. The drive unit 9 drives the drive wheel 12 to rotate. The drive wheel 12 drives the driven wheel 12 through the transmission belt 11. The driven wheel 12 drives the rotating tube 6 to rotate.

[0022] A row of cooling and stirring elements 7 is connected to both sides of the rotating tube 6. The two rows of cooling and stirring elements 7 are symmetrically arranged. In this embodiment, there are three cooling and stirring elements 7 in one row. The cooling and stirring elements 7 are U-shaped tubes. Both ends of the U-shaped tubes are connected to the rotating tube 6. A set of baffles 6.1 are connected from top to bottom inside the rotating tube 6. Each baffle 6.1 is located between the two ends of the U-shaped tube, so that the coolant in the rotating tube 6 can only enter from the upper end of the U-shaped tube and then exit from the lower end to re-enter the rotating tube 6, thereby filling the U-shaped tube with coolant. When the U-shaped tube stirs the material, it can better absorb and neutralize the heat generated by the reaction of the material.

[0023] A material dispersing component 8 is connected above and outside the rotating tube 6. The material dispersing component 8 includes a material tray 8.1 and a dispersing platform 8.2 connected at the upper center of the material tray 8.1. The dispersing platform 8.2 is a frustum and has a through hole that extends downward through the material tray 8.1. The rotating tube 6 is inserted and fixed in the through hole. An annular groove is formed between the dispersing platform 8.2 and the material tray 8.1. Discharge holes 8.3 are evenly distributed in the annular groove. The material can be evenly discharged through the discharge holes 8.3. During operation, the rotating tube 6 drives the material tray 8.1 and the dispersing platform 8.2 to rotate. The material is fed into the reactor 1 from the feed hopper 2 and falls onto the dispersing platform 8.2. Then, it rolls down the dispersing platform 8.2 into the annular groove. Finally, the material can be evenly sprinkled out through the discharge holes 8.2 to fully mix and react with the material below.

[0024] A water inlet pipe 13 is inserted into the upper opening of the rotating tube 6. The water inlet pipe 13 is connected to the top of the reactor 1 via a support frame 14. This reactor is to be used in conjunction with a coolant storage tank and a refrigeration unit. The other end of the water inlet pipe 13 is connected to the coolant storage tank. The coolant storage tank is connected to the refrigeration unit via a pipe. The inlet of the refrigeration unit is connected to the outlet of the spiral coil 5.1. After heat exchange, the coolant returns to the refrigeration unit for recooling and is then transported to the coolant storage tank for storage.

[0025] A spiral coil 5.1 is provided inside the cooling chamber 5. The outer port of the spiral coil 5.1 passes through the side wall of the cooling chamber 5, and the inner port of the spiral coil 5.1 is connected to a vertical pipe 5.2. A rotating pipe 6 is inserted into the vertical pipe 5.2, so that the coolant in the rotating pipe 6 enters the spiral coil 5.1. The temperature inside the cooling chamber 5 is reduced by the spiral coil 5.1, thereby reducing the temperature inside the reaction chamber 4 from the bottom.

[0026] Working Principle: In operation, this reactor first uses a drive device 9 to agitate the materials via a cooling and stirring element 7. When adding other materials, the rotating tube 6 rotates the material tray 8.1 and the dispersing platform 8.2. The material enters the reactor 1 from the feed hopper 2 and falls onto the dispersing platform 8.2, then rolls down into the annular groove. Finally, the material is evenly distributed through the discharge hole 8.2, allowing for thorough mixing and reaction with the materials below. The reaction releases a large amount of heat. At this time, the coolant storage tank supplies coolant to the rotating tube 6 through the inlet pipe 13. The coolant enters two rows of U-shaped tubes from top to bottom, allowing the U-shaped tubes to both agitate and exchange heat with the raw materials, lowering the temperature. The coolant then enters the spiral coil 5.1 to further absorb the heat generated by acid hydrolysis in the reaction chamber 4. Finally, the coolant in the spiral coil 5.1 returns to the chiller for further cooling before returning to the coolant storage tank, ready to enter the rotating tube 6 again for cooling.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A glyphosate hydrolysis reactor, comprising a reaction vessel (1), a feed hopper (2), and a discharge pipe, characterized in that: A partition (3) is connected inside the reactor (1). The partition (3) divides the reactor (1) into a reaction chamber (4) and a cooling chamber (5). Rotating holes are provided on both the upper and lower sides of the reaction chamber (4). A rotating tube (6) is inserted between the two rotating holes. A row of cooling and stirring components (7) is connected on both sides of the rotating tube (6). A material dispersing component (8) is connected above the outer side of the rotating tube (6).

2. The glyphosate hydrolysis reactor according to claim 1, characterized in that: A spiral coil (5.1) is provided in the cooling chamber (5). The outer port of the spiral coil (5.1) passes through the side wall of the cooling chamber (5). The inner port of the spiral coil (5.1) is connected to the vertical pipe (5.2). The rotating pipe (6) is inserted into the vertical pipe (5.2).

3. The glyphosate hydrolysis reactor according to claim 1, characterized in that: The material dispersing component (8) includes a material tray (8.1), and a dispersing platform (8.2) is connected to the upper center of the material tray (8.1). An annular groove is formed between the dispersing platform (8.2) and the material tray (8.1), and discharge holes (8.3) are evenly distributed in the annular groove.

4. The glyphosate hydrolysis reactor according to claim 1, characterized in that: The cooling and stirring component (7) is a U-shaped tube, and both ends of the U-shaped tube are connected to the rotating tube (6).

5. A glyphosate hydrolysis reactor according to claim 4, characterized in that: A set of partitions (6.1) are connected from top to bottom inside the rotating tube (6), and each partition (6.1) is located between the two openings of the U-shaped tube.

6. A glyphosate hydrolysis reactor according to claim 1, characterized in that: A drive device (9) is connected to the upper side of the reactor (1), and the drive device (9) drives the rotating tube (6) through a transmission mechanism.

7. A glyphosate hydrolysis reactor according to claim 6, characterized in that: The transmission mechanism includes a drive wheel (10), which is connected to the drive shaft of the drive device (9). The drive wheel (10) drives the driven wheel (12) through the transmission belt (11), and the driven wheel (12) is connected to the rotating tube (6).

8. A glyphosate hydrolysis reactor according to claim 1, characterized in that: A water inlet pipe (13) is inserted into the upper opening of the rotating tube (6), and the water inlet pipe (13) is connected to the top of the reactor (1) through a support frame (14).

9. A glyphosate hydrolysis reactor according to claim 1, characterized in that: An annular limiting groove is provided on the inner side of each of the rotating holes, and an annular limiting plate (4.1) is rotatably connected in each annular limiting groove. The annular limiting plate (4.1) is sleeved and fixed on the outside of the rotating tube (6).

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