A glyphosate continuous crystallization device

Abstract

The utility model relates to a glyphosate continuous crystallization device, wherein the primary static mixer and the secondary static mixer are same in structure, the upper end is all external with lye pipeline, and is equipped with glyphosate desolventizing solution feeding pipe and discharge pipe a respectively at both ends of the primary static mixer, is equipped with intermediate feeding pipe and discharge pipe b respectively at both ends of the secondary static mixer, the upper end of the primary crystallization kettle is communicated with the discharge pipe a through injection pipe a, the lower end is communicated with the intermediate feeding pipe through discharge pipe a, the outer wall of the primary crystallization kettle is equipped with interlayer, is installed with liquid level meter at side end, the both sides of upper surface are equipped with on -line thermometer, on -line ph meter and radar liquid level instrument in proper order, the intermediate position of upper surface is vertically rotatory and is equipped with stirring shaft, the upper end of stirring shaft is connected with stirring motor, and the lower end is connected with stirring paddle, the secondary crystallization kettle is same in structure with the primary crystallization kettle, the upper end is communicated with the discharge pipe b through injection pipe b, and the lower end is equipped with discharge pipe b, the utility model has the advantages of convenient operation and good production use effect.

Description

Technical Field

[0001] This utility model belongs to the field of chemical equipment, specifically relating to a glyphosate continuous crystallization device. Background Technology

[0002] Glyphosate possesses the characteristics of high efficiency, low toxicity, broad spectrum, and non-selective activity, making it a superior herbicide and the world's largest-selling and most popular producer. The rapid increase in the global population and the development of genetically modified technology have provided vast opportunities for glyphosate production. Domestically, glyphosate production mainly utilizes the alkyl ester method. Specifically, it involves adding and condensing glycine, dimethyl phosphite, and paraformaldehyde as raw materials to create a synthesis liquid. This liquid is then fed into a hydrolysis reactor, where hydrolysis and desolvation are carried out with the addition of hydrochloric acid. Finally, alkali is added for crystallization. The success or failure of the crystallization stage is crucial to the overall yield of glyphosate synthesis. However, in the current crystallization stage, liquid alkali is added directly to the reactor in a single step. This method has limitations in practical implementation. Neutralization reactions can cause a dramatic increase in the temperature of materials inside the reactor, and the pH value of the mixture is easily unstable and fluctuates greatly due to uneven mixing during the neutralization process. This severely affects the crystallization of glyphosate, leading to an increase in glyphosate residue in the mother liquor and a significant reduction in glyphosate yield. At the same time, drastic temperature and pH changes also have a significant impact on the particle size and uniformity of glyphosate crystals, which has a major impact on the product quality of glyphosate. Furthermore, existing glyphosate crystallization processes mostly rely on manual sampling and analysis, resulting in low automation and delayed analytical data. Therefore, to solve the above problems, it is necessary to develop a continuous glyphosate crystallization device that is easy to operate and has good production performance. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a glyphosate continuous crystallization device that is easy to operate and has good production and use effects.

[0004] The purpose of this utility model is achieved as follows: A glyphosate continuous crystallization device includes a primary static mixer, a secondary static mixer, a primary crystallization vessel, and a secondary crystallization vessel. The primary and secondary static mixers have the same structure, and both are externally connected to an alkali solution pipeline at their upper ends. The primary static mixer has a glyphosate desulfurization inlet pipe at its left end and a discharge pipe a at its right end. The secondary static mixer has a middle inlet pipe at its left end and a discharge pipe b at its right end. The primary crystallization vessel is located between the primary and secondary static mixers, and its upper end is connected to the discharge pipe a via an injection pipe a, and its lower end is connected to the discharge pipe a via a discharge pipe a. The intermediate feed pipes are interconnected, and the outer wall of the primary crystallizer is equipped with a jacket. A level gauge is installed on the side. An online thermometer, an online pH meter, and a radar level gauge are installed on both sides of the upper surface in sequence. A stirring shaft is vertically rotatably inserted in the middle of the upper surface. A cooling water inlet is connected to the lower left of the jacket, and a cooling water outlet is connected to the upper right. A stirring motor is connected to the upper end of the stirring shaft, and the lower end is located inside the primary crystallizer and connected to a stirring paddle. The secondary crystallizer has the same structure as the primary crystallizer and is located on the side of the secondary static mixer. The upper end of the secondary crystallizer is connected to the discharge pipe b through the injection pipe b, and a discharge pipe b is provided in the middle of the lower end.

[0005] Furthermore, an alkaline solution analysis device is installed on the alkaline solution pipeline.

[0006] Furthermore, the stirring motor is fitted with a protective net.

[0007] Furthermore, an acidity meter is installed on the glyphosate desolvation solution feed pipe.

[0008] Furthermore, a flushing pipe is provided on the right side of the upper end of the secondary crystallization vessel.

[0009] Furthermore, the online thermometer, online pH meter, and radar level gauge installed at the top of the primary crystallizer and the secondary crystallizer are all connected to a DCS computer via data transmission lines.

[0010] Furthermore, online liquid flow meters are installed on the glyphosate descaling inlet pipe, the alkali pipe, and the discharge pipe a.

[0011] The beneficial effects of this utility model are as follows: This utility model uses a primary static mixer, a secondary static mixer, a primary crystallizer, and a secondary crystallizer to process glyphosate crystals through secondary neutralization and secondary crystallization. This allows for relatively precise and stable control of temperature and pH during the glyphosate crystallization process, thus avoiding the problems of poor crystallization and uneven glyphosate crystal particles caused by drastic changes in temperature and pH, thereby improving the quality of glyphosate. At the same time, the use of a stirring shaft, stirring motor, and stirring paddle ensures that the alkaline solution and glyphosate desolvation solution are fully mixed through the stirring effect of the stirring paddle. This avoids the problem of unstable pH value of the mixed solution caused by uneven mixing during the neutralization process, which would seriously affect the glyphosate crystallization and glyphosate yield.

[0012] This invention, by incorporating an online thermometer, online pH meter, radar level gauge, and online liquid flow meter, allows for continuous analysis and measurement of the neutralization status of materials inside the primary and secondary crystallization reactors. The measured data is transmitted in real-time to a DCS computer for monitoring and analysis, thereby improving responsiveness through immediate adjustments. The high degree of automation reduces analytical errors and delays associated with manual sampling and analysis, thus improving work efficiency and product quality. Overall, this invention offers the advantages of convenient operation and excellent production performance. Attached Figure Description

[0013] Figure 1 This is a flowchart illustrating the structure of this utility model.

[0014] In the diagram: 1. Primary static mixer; 11. Glyphosate desolvation inlet pipe; 12. Discharge pipe a; 13. pH meter; 2. Secondary static mixer; 21. Intermediate inlet pipe; 22. Discharge pipe b; 3. Primary crystallizer; 31. Injection pipe a; 32. Discharge pipe a; 33. Stirring shaft; 34. Stirring motor; 35. Stirring paddle; 4. Secondary crystallizer; 41. Injection pipe b; 42. Discharge pipe b; 43. Flushing pipe; 5. Alkali pipe; 51. Alkali analysis device; 6. Level gauge; 7. Online thermometer; 8. Online pH meter; 9. Radar level gauge. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Example: Figure 1As shown, a glyphosate continuous crystallization device includes a primary static mixer 1, a secondary static mixer 2, a primary crystallization vessel 3, and a secondary crystallization vessel 4. The primary static mixer 1 and the secondary static mixer 2 have the same structure, and both are externally connected to an alkali solution pipe 5 at their upper ends. The primary static mixer 1 has a glyphosate desolvation inlet pipe 11 at its left end and a discharge pipe a12 at its right end. The secondary static mixer 2 has an intermediate inlet pipe 21 at its left end and a discharge pipe b22 at its right end. The primary crystallization vessel 3 is located between the primary static mixer 1 and the secondary static mixer 4. Its upper end is connected to the discharge pipe a12 via an injection pipe a31, and its lower end is connected to the intermediate inlet pipe 21 via a discharge pipe a32. The two crystallizers are interconnected, and the outer wall of the primary crystallizer 3 is equipped with a jacket. A level gauge 6 is installed on the side. An online thermometer 7, an online pH meter 8, and a radar level gauge 9 are installed on both sides of the upper surface. A stirring shaft 33 is vertically rotatably installed in the middle of the upper surface. A cooling water inlet is connected to the lower left of the jacket, and a cooling water outlet is connected to the upper right. A stirring motor 34 is connected to the upper end of the stirring shaft 33, and the lower end is located inside the primary crystallizer 3 and connected to a stirring paddle 35. The secondary crystallizer 4 has the same structure as the primary crystallizer 3 and is located on the side of the secondary static mixer 2. The upper end of the secondary crystallizer 4 is connected to the discharge pipe b22 through the injection pipe b41, and the middle of the lower end is provided with a discharge pipe b42.

[0017] An alkaline solution analyzer 51 is installed on the alkaline solution pipeline 5 to detect the alkalinity of the alkaline solution. A protective net is fitted around the stirring motor 34 to protect it. An acidity meter 13 is installed on the glyphosate desulfurization inlet pipe 11 to detect the acidity of the glyphosate desulfurization solution. A flushing pipe 43 is provided on the right side of the upper end of the secondary crystallizer 4 to flush the crystallized material in the secondary crystallizer 4, thereby preventing blockage of the discharge pipe b42. An online thermometer 7, an online pH meter 8, and a radar level gauge 9 installed on the upper end of the primary crystallizer 3 and the secondary crystallizer 4 are all connected to a DCS computer via data transmission lines. Online liquid flow meters are installed on the glyphosate desulfurization inlet pipe 11, the alkaline solution pipeline 5, and the discharge pipe a32.

[0018] In use, this invention employs a combination of a primary static mixer 1, a secondary static mixer 2, a primary crystallizer 3, and a secondary crystallizer 4. Through secondary neutralization and secondary crystallization, the glyphosate crystallization process is processed, ensuring relatively precise and stable temperature and pH control. This avoids poor crystallization and uneven glyphosate particle size caused by drastic temperature and pH fluctuations, thus improving glyphosate quality. Simultaneously, during neutralization and crystallization, the stirring motor 34 is activated. Its rotation drives the stirring shaft 33 and the stirring paddle 35, ensuring thorough mixing of the alkaline solution and the glyphosate solution. This prevents pH instability in the mixture due to uneven mixing during neutralization, which could severely affect the glyphosate's performance. This invention addresses the issues of crystallization and glyphosate yield. Furthermore, by using an online thermometer 7, an online pH meter 8, a radar level gauge 9, and an online liquid flow meter, the neutralization status of materials inside the primary crystallizer 3 and the secondary crystallizer 4 can be continuously analyzed and measured. The measured data is transmitted in real-time to a DCS computer via a data transmission line for data monitoring and analysis. The analysis results allow for timely adjustment of the internal temperature and material injection rate of the primary and secondary crystallizers 3 and 4, thereby improving the overall responsiveness of this invention. Compared to existing manual sampling and analysis methods, this structure offers a high degree of automation. It also reduces analytical errors and delays associated with manual sampling and analysis, improving work efficiency and product quality. In summary, this invention offers the advantages of convenient operation and good production performance.

[0019] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model without departing from the spirit and scope of this utility model. Any modifications or equivalent substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A glyphosate continuous crystallization apparatus, comprising a primary static mixer (1), a secondary static mixer (2), a primary crystallizer (3), and a secondary crystallizer (4), characterized in that: The primary static mixer (1) and the secondary static mixer (2) have the same structure, and both are connected to an alkali pipe (5) at their upper ends. The primary static mixer (1) has a glyphosate desolvation inlet pipe (11) at its left end and a discharge pipe a (12) at its right end. The secondary static mixer (2) has an intermediate inlet pipe (21) at its left end and a discharge pipe b (22) at its right end. The primary crystallizer (3) is located between the primary static mixer (1) and the secondary static mixer (2). Its upper end is connected to the discharge pipe a (12) through the injection pipe a (31), and its lower end is connected to the intermediate inlet pipe (21) through the discharge pipe a (32). The primary crystallizer (3) has an inner jacket on its outer wall. A level gauge (6) is installed at the end. An online thermometer (7), an online pH meter (8), and a radar level gauge (9) are arranged sequentially on both sides of the upper surface. A stirring shaft (33) is vertically rotated through the middle of the upper surface. A cooling water inlet is connected to the lower left of the interlayer, and a cooling water outlet is connected to the upper right. A stirring motor (34) is connected to the upper end of the stirring shaft (33), and the lower end is located inside the primary crystallizer (3) and connected to a stirring paddle (35). The secondary crystallizer (4) has the same structure as the primary crystallizer (3) and is located on the side of the secondary static mixer (2). The upper end of the secondary crystallizer (4) is connected to the discharge pipe (22) through the injection pipe (41), and the middle of the lower end is provided with a discharge pipe (42).

2. The glyphosate continuous crystallization apparatus as described in claim 1, characterized in that: An alkaline analysis device (51) is installed on the alkaline pipeline (5).

3. The glyphosate continuous crystallization apparatus as described in claim 1, characterized in that: The stirring motor (34) is covered with a protective net.

4. The glyphosate continuous crystallization apparatus as described in claim 1, characterized in that: A pH meter (13) is installed on the glyphosate desolvation feed pipe (11).

5. A glyphosate continuous crystallization apparatus as described in claim 1, characterized in that: The secondary crystallizer (4) is equipped with a flushing pipe (43) on the right side of the upper end.

6. A glyphosate continuous crystallization apparatus as described in claim 1, characterized in that: The online thermometer (7), online pH meter (8), and radar level gauge (9) installed on the upper end of the primary crystallizer (3) and the secondary crystallizer (4) are all connected to a DCS computer via data transmission lines.

7. A glyphosate continuous crystallization apparatus as described in claim 1, characterized in that: Online liquid flow meters are installed on the glyphosate descaling inlet pipe (11), alkali pipe (5), and discharge pipe a (32).

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