Preparation process of low-foam additive of glufosinate-fluoroglycofen-ethyl microemulsion

Abstract

The invention discloses a preparation process of a low-foam auxiliary agent of glufosinate-fluoroglycofen-ethyl microemulsion, which is characterized in that the design of a defoaming filter cone is added on the basis of a stirring device, and multi-stage defoaming treatment, vacuum defoaming and ultrasonic treatment are combined, so that tiny bubbles generated in the stirring and mixing process can be thoroughly eliminated, and the uniformity of the low-foam auxiliary agent is ensured. The multi-layer defoaming design ensures that the final auxiliary agent has lower foam amount, and the emulsifying and stabilizing performance of the auxiliary agent is remarkably improved. The low-foam surfactant, the defoaming agent and the stabilizer are reasonably selected and proportioned, so that the low-foam property of the aid and the stability of the microemulsion are ensured. The polyether or silicone oil defoaming agent is adopted, so that foam generation is effectively reduced; by adding a high-molecular polymer or a modified siloxane stabilizer, the stability of the microemulsion is further improved; according to the combined formula, the emulsifying effect and the environmental disturbance resistance of the preparation can be improved on the premise of ensuring the low-foam effect.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural adjuvants, and in particular to a preparation process of a low-foam adjuvant of a glufosinate-fluoropyralid microemulsion. Background Art

[0002] In the production process of pesticide preparations, glufosinate-ammonium and fluazifop-butyl microemulsions are important herbicides, and the stability of their performance and the effectiveness of their application greatly depend on the emulsification effect and foam control ability of the preparations. However, in the existing glufosinate-fluazifop-butyl microemulsion preparation process, the low foaming effect of the adjuvant and the stability of the microemulsion have always troubled researchers. In the traditional preparation process, a large amount of foam is often generated in the stirring and emulsification steps, which not only affects the uniformity of the mixing, but also may lead to poor emulsification effect, thereby reducing the stability and effectiveness of the microemulsion.

[0003] The current microemulsion preparation process often uses a single defoamer or surfactant to control foam, but this method has limited effect, especially in pesticide microemulsions with complex formulas, the foam problem is still difficult to solve effectively. In addition, traditional stirring equipment is difficult to fully optimize the flow path of liquid preparations during the stirring process, resulting in uneven local mixing. At the same time, too much air is introduced, which increases the generation of foam and affects the low-foam performance and emulsification effect of the additive. Therefore, it is urgent to develop a process that can effectively control foam, improve emulsification effect and improve the stability of microemulsions. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] Therefore, in order to solve the above technical problems, the present invention provides the following technical solutions: a preparation process of a low-foaming adjuvant of a glufosinate-fluoropyralid microemulsion, the preparation process uses a preparation device, the preparation device includes a main unit, a stirring unit, a pre-defoaming unit, a vacuum defoaming device and an ultrasonic device, and the preparation process includes the following steps:

[0006] S1: pre-mix the low-foaming surfactant and the defoaming agent at room temperature, and slowly add the stabilizer under stirring conditions to further improve the emulsification effect of the auxiliary agent and the stability of the microemulsion; after sufficient mixing, a uniform mixed solution is obtained;

[0007] S11: starting the motor so that the motor drives the stirring blades on the stirring shaft to rotate, the stirring blades generate stirring force in the liquid preparation, the inclined stirring blades cause violent disturbance of the liquid preparation, so that the liquid preparation is evenly mixed, and the foam generated during the stirring process gradually gathers on the surface of the mixed solution;

[0008] S12: When the stirring is completed, the motor is paused, and the electric telescopic rod is started to push the defoaming filter bucket down to the surface of the mixed solution, so that the bottom of the feed port is immersed below the liquid level of the mixed solution. At the same time, the height of the driven rack group is driven to descend, so that the driven rack group drives the driven gear to rotate, and the driven gear drives the meshing gear to rotate. The two sets of meshing gears drive the corresponding stirring blades to rotate in the opposite direction to a horizontal state through the corresponding blade shaft;

[0009] S13: Start the motor again, so that the motor drives the stirring shaft to rotate, so that the defoaming filter bucket and the stirring blade rotate synchronously, and the foam on the surface of the liquid preparation enters the defoaming chamber from the feed port, and the defoaming needle arranged on the inner wall of the defoaming chamber pierces the foam to reduce the foam volume. The concave bubble collecting chamber design prevents the foam from overflowing and effectively converts it into gas or liquid; the stirring blade in the horizontal state can continuously stir the mixed solution to maintain the uniformity of the mixed solution, and is not easy to generate bubbles, and at the same time, optimizes the defoaming effect;

[0010] S2: After the mixing is completed, the mixed solution is discharged into the vacuum defoaming device through the discharge pipe, and a low-pressure environment is set to continuously vacuum to remove the tiny bubbles generated during the mixing process and improve the low-foam effect of the preparation;

[0011] S3: The additive mixture in the vacuum defoaming device is introduced into the ultrasonic equipment through a pipeline, and the ingredients of the additives are further evenly distributed through ultrasonic technology to ensure that the various components in the mixed solution are effectively combined, improve emulsification and stability, and reduce foam generation;

[0012] S4: After standing and settling, a low-foaming adjuvant of glufosinate-fluoropyralid microemulsion is obtained;

[0013] Among them, the main unit includes a stirring barrel, which is connected to a vacuum defoaming device and an ultrasonic device in sequence through a discharge pipe; the stirring unit includes a stirring shaft and a stirring blade, the stirring shaft is rotatably installed in the stirring barrel, the stirring blade is fixed on the stirring shaft, and the stirring shaft is connected to a motor; the pre-defoaming unit includes a defoaming filter bucket, the defoaming filter bucket is fixed on the stirring shaft, a defoaming cavity is arranged inside the defoaming filter bucket, a feed port is opened on one side of the defoaming cavity, so that during the rotation of the defoaming filter bucket, the foam on the surface of the mixed solution enters the defoaming cavity from the feed port, and a defoaming needle is arranged on the inner wall of the defoaming cavity.

[0014] As a preferred solution for the preparation process of the low-foaming adjuvant of the glufosinate-fluoropyralid microemulsion of the present invention, the low-foaming surfactant includes a non-ionic or low-foaming anionic surfactant, and the defoamer is a polyether or silicone oil defoamer.

[0015] As a preferred solution for the preparation process of the low-foaming adjuvant of the glufosinate-fluoropyralid microemulsion of the present invention, the stabilizer is a high molecular polymer or modified siloxane to improve the emulsification effect of the adjuvant and the stability of the microemulsion.

[0016] As a preferred solution for the preparation process of the low-foaming adjuvant of the glufosinate-fluoropyralid microemulsion of the present invention, the weight ratio of the low-foaming surfactant to the defoamer and stabilizer is 5:3:2.

[0017] As a preferred solution for the preparation process of the low-foaming adjuvant of the glufosinate-fluoropyralid microemulsion of the present invention, the uniform mixed liquid after premixing is defoamed in a vacuum defoaming device, the defoaming time is 10-30 minutes, and the temperature is controlled at 4-10°C.

[0018] As a preferred solution for the preparation process of the low-foaming adjuvant of the glufosinate-fluoropyralid microemulsion of the present invention, the uniform mixed liquid is subjected to ultrasonic emulsification treatment, the ultrasonic frequency is 20-40 kHz, and the treatment time is 20 minutes.

[0019] As a preferred solution of the preparation process of the low-foaming adjuvant of the glufosinate-fluoropyralid microemulsion of the present invention, a feeding pipe is arranged at the top of the stirring barrel, a collecting hopper is connected to the bottom of the stirring barrel, and the bottom of the collecting hopper is connected to a discharge pipe.

[0020] As a preferred solution of the preparation process of the low-foaming adjuvant of the glufosinate-fluoropyralid microemulsion of the present invention, the rear side of the defoaming filter bucket is connected with a concave bubble collecting cavity to prevent foam overflow; the top of the defoaming filter bucket is connected with an electric telescopic rod, the top of the electric telescopic rod is fixed on a mounting seat, and the mounting seat is fixed on a stirring shaft.

[0021] As a preferred solution of the preparation process of the low-foaming adjuvant of the glufosinate-fluoropyralid microemulsion of the present invention, the stirring unit also includes a driven rack group, the bottom of the mounting seat is connected to the driven rack group, one side of the driven rack group is meshingly connected to a driven gear, one side of the driven gear is meshingly connected to a meshing gear, the meshing gear is fixed on the blade shaft, the blade shaft is rotatably mounted on the blade hinge seat, the blade hinge seat is fixed on the stirring shaft, and the blade shaft is fixedly connected to the stirring blade.

[0022] As a preferred solution of the preparation process of the low-foaming adjuvant of the glufosinate-fluoropyralid microemulsion of the present invention, the stirring blades are provided with two groups, the two groups of stirring blades are arranged in a "V" shape on both sides of the stirring shaft, each group of stirring blades is connected to a group of blade rotating shafts, each group of blade rotating shafts is fixedly connected to a group of meshing gears, each group of meshing gears is meshingly connected to a group of driven gears, and the two groups of meshing gears are respectively arranged on both sides of the driven rack group.

[0023] Beneficial effects of the present invention:

[0024] 1. The present invention adds a defoaming filter bucket design on the basis of the stirring device, and combines multi-stage defoaming treatment; through the linkage rotation of the stirring blade and the defoaming filter bucket, the foam generated on the surface of the liquid preparation is effectively guided into the defoaming chamber for physical defoaming, ensuring the efficient removal of large-scale foam and improving the quality of the liquid preparation mixing process; this solution also combines vacuum defoaming and ultrasonic treatment at the same time to ensure that the tiny bubbles generated during the stirring and mixing process can be completely removed. This multi-level defoaming design ensures that the final additive has a lower foam amount and significantly improves the emulsification and stability of the additive.

[0025] 2. The stirring device of the present invention includes a defoaming filter bucket and a V-shaped stirring blade structure. The defoaming filter bucket guides the foam to the defoaming chamber by rotating in conjunction with the stirring blade, and physically breaks the foam through a built-in defoaming needle. At the same time, the V-shaped design of the stirring blade can ensure that the liquid preparation maintains uniform flow and mixing during the stirring process. At a later stage, by controlling its horizontal structure, it can continuously and synchronously stir the materials during the defoaming process, which not only reduces the involvement of bubbles and ensures the uniformity of the materials, but also optimizes the defoaming effect. Compared with traditional stirring equipment, this design is more precise and efficient, and significantly improves the low-foaming effect and emulsification efficiency of the additive.

[0026] 3. The present invention ensures the low foaming property of the additive and the stability of the microemulsion by rationally selecting and proportioning low foaming surfactants, defoamers and stabilizers. The use of polyether or silicone oil defoamers effectively reduces foam generation; the addition of high molecular polymers or modified siloxane stabilizers further improves the stability of the microemulsion. This combination formula can enhance the emulsification effect and resistance to environmental disturbance of the preparation while ensuring the low foaming effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0029] Figure 2 It is a schematic cross-sectional structural diagram of the stirring barrel of the present invention.

[0030] Figure 3 It is a schematic diagram of the specific structure of the stirring unit of the present invention.

[0031] Figure 4 It is a schematic diagram of a partially enlarged structure of the present invention.

[0032] Figure 5 It is a schematic diagram of the rear view structure of the stirring unit of the present invention.

[0033] Figure 6 It is a schematic diagram of the specific structure of the pre-defoaming unit of the present invention.

[0034] In the figure: 100, main unit; 101, mixing barrel; 102, collecting hopper; 103, discharge pipe; 104, feeding pipe;

[0035] 200, stirring unit; 201, stirring shaft; 202, stirring blade; 203, driven rack set; 204, driven gear; 205, meshing gear; 206, blade hinge seat; 207, motor;

[0036] 300, pre-defoaming unit; 301, defoaming filter; 302, defoaming chamber; 303, defoaming needle; 304, bubble collecting chamber; 305, electric telescopic rod;

[0037] 400. Vacuum defoaming device;

[0038] 500. Ultrasonic equipment. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0040] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0041] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0042] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0043] Reference Figures 1 to 6 , which is an embodiment of the present invention, provides a preparation process of a low-foaming adjuvant of a glufosinate-fluoropyralid microemulsion, wherein the preparation process uses a preparation device, which includes a main unit 100, a stirring unit 200, a pre-defoaming unit 300, a vacuum defoaming device 400 and an ultrasonic device 500,

[0044] The main unit 100 includes a mixing barrel 101, which is connected to a vacuum defoaming device 400 and an ultrasonic device 500 in sequence through a discharge pipe 103. The ultrasonic technology and the vacuum defoaming technology are combined to further improve the emulsification effect and stability of the additive, and effectively remove the tiny bubbles generated during the mixing process. This multiple treatment method ensures the quality stability of the microemulsion and reduces the possibility of foam generation. A feeding pipe 104 is arranged at the top of the mixing barrel 101, and a collecting hopper 102 is connected to the bottom of the mixing barrel 101. The bottom of the collecting hopper 102 is connected to the discharge pipe 103.

[0045] The stirring unit 200 includes a stirring shaft 201 and a stirring blade 202, wherein the stirring shaft 201 is rotatably mounted in the stirring barrel 101, the stirring blade 202 is fixed on the stirring shaft 201, and the stirring shaft 201 is connected to a motor 207; the stirring unit 200 also includes a driven rack group 203, the bottom of the mounting seat is connected to the driven rack group 203, one side of the driven rack group 203 is meshingly connected to a driven gear 204, one side of the driven gear 204 is meshingly connected to a meshing gear 205, the meshing gear 205 is fixed to the blade shaft, the blade shaft is rotatably mounted on a blade hinge seat 206, and the blade hinge seat 206 is fixed to the stirring shaft 201 , the blade shaft is fixedly connected to the stirring blade 202; the stirring blade 202 is provided with two groups, and the two groups of stirring blades 202 are arranged on both sides of the stirring shaft 201 in a "V"-shaped structure, each group of stirring blades 202 is connected to a group of blade shafts, each group of blade shafts is fixedly connected to a group of meshing gears 205, each group of meshing gears 205 is meshingly connected to a group of driven gears 204, and the two groups of meshing gears 205 are respectively arranged on both sides of the driven rack group 203; through the gear system and the adjustable stirring blades 202, the present invention can accurately control the stirring speed, state and defoaming effect, so as to maintain consistent production performance under different production conditions;

[0046] The pre-defoaming unit 300 includes a defoaming filter bucket 301, which is fixed on the stirring shaft 201. A defoaming chamber 302 is arranged inside the defoaming filter bucket 301. A feed inlet is provided on one side of the defoaming chamber 302, so that during the rotation of the defoaming filter bucket 301, the foam on the surface of the mixed solution enters the defoaming chamber 302 from the feed inlet. A defoaming needle 303 is arranged on the inner wall of the defoaming chamber 302; a concave bubble collecting chamber 304 is connected to the rear side of the defoaming filter bucket 301 to prevent the foam from overflowing; an electric telescopic rod is connected to the top of the defoaming filter bucket 301. 305, the top end of the electric telescopic rod 305 is fixed on the mounting base, and the mounting base is fixed on the stirring shaft 201; by arranging the defoaming filter bucket 301 and the defoaming chamber 302, combined with the design of the defoaming needle 303, efficient removal of foam is achieved; the rotation of the defoaming filter bucket 301 and the physical destructive effect of the defoaming needle 303 can effectively reduce the foam volume and improve the overall defoaming effect; the present invention introduces the electric telescopic rod 305 and the precision gear transmission system, so that the height of the defoaming filter bucket 301 and the angle of the stirring blade 202 can be automatically adjusted, thereby optimizing the stirring and defoaming effects.

[0047] The present invention integrates the stirring unit 200 and the defoaming unit 300 into the same device (stirring barrel 101), which not only simplifies the equipment structure but also improves the convenience of operation. Through the integrated design, the occupied space and maintenance cost of the equipment can be reduced.

[0048] The preparation process of the low foaming adjuvant for glufosinate-fluoropyralid microemulsion by the above-mentioned preparation device comprises the following steps:

[0049] S1: premixing a low-foaming surfactant and a defoaming agent at room temperature to obtain a uniform mixed solution; the low-foaming surfactant includes a non-ionic or low-foaming anionic surfactant, and the defoaming agent is a polyether or silicone oil defoaming agent; the weight ratio of the low-foaming surfactant to the defoaming agent and the stabilizer is 5:3:2;

[0050] Slowly adding a stabilizer under stirring conditions to further improve the emulsification effect of the auxiliary agent and the stability of the microemulsion; the stabilizer is a high molecular polymer or modified siloxane to improve the emulsification effect of the auxiliary agent and the stability of the microemulsion;

[0051] S11: starting the motor 207 so that the motor 207 drives the stirring blade 202 on the stirring shaft 201 to rotate, and the stirring blade 202 generates a stirring force in the liquid preparation. The inclined stirring blade 202 causes a violent disturbance of the liquid preparation, so that the liquid preparation is evenly mixed, and the foam generated during the stirring process gradually gathers on the surface of the mixed solution;

[0052] S12: When the stirring is completed, the motor 207 is paused, and the electric telescopic rod 305 is started to push the defoaming filter bucket 301 down to the surface of the mixed solution, so that the bottom of the feed port is immersed below the liquid level of the mixed solution. At the same time, the driven rack group 203 is driven to descend in height, so that the driven rack group 203 drives the driven gear 204 to rotate, and the driven gear 204 drives the meshing gear 205 to rotate. The two sets of meshing gears 205 drive the corresponding stirring blades 202 to rotate in the opposite direction to a horizontal state through the corresponding blade shafts;

[0053] S13: Start the motor 207 again, so that the motor 207 drives the stirring shaft 201 to rotate, so that the defoaming filter 301 and the stirring blade 202 rotate synchronously, and the foam on the surface of the liquid preparation enters the defoaming chamber 302 from the feed port, and the defoaming needle 303 arranged on the inner wall of the defoaming chamber 302 pierces the foam to reduce the foam volume. The concave bubble collecting chamber 304 is designed to prevent the foam from overflowing and effectively convert it into gas or liquid; the stirring blade 202 in a horizontal state can continuously stir the mixed solution, maintain the uniformity of the mixed solution, and is not easy to generate bubbles, and at the same time, optimize the defoaming effect;

[0054] S2: After the mixing is completed, the mixed solution is discharged into the vacuum defoaming device 400 through the discharge pipe 103, and a low-pressure environment is set to continuously evacuate the mixture to remove tiny bubbles generated during the mixing process and improve the low-foaming effect of the preparation. The pre-mixed uniform mixed solution is degassed in the vacuum defoaming device 400 for 10-30 minutes and the temperature is controlled at 4-10°C.

[0055] S3: introducing the auxiliary agent mixture in the vacuum defoaming device 400 into the ultrasonic device 500 through a pipeline, and further uniformly distributing the ingredients of the auxiliary agent through ultrasonic technology to ensure that the components in the mixed solution are effectively combined, improve emulsification and stability, and reduce foam generation; the uniform mixed solution is subjected to ultrasonic emulsification treatment, the ultrasonic frequency is 20-40kHz, and the treatment time is 20 minutes;

[0056] S4: After standing and settling, a low foaming adjuvant of glufosinate-fluoropyralid microemulsion is obtained.

[0057] In the present invention, the bubbles generated in the microemulsion preparation process are comprehensively reduced through multi-level defoaming treatment, including physical defoaming, vacuum defoaming and ultrasonic defoaming. In particular, the application of ultrasonic technology can evenly distribute the components of the auxiliary agent through the vibration effect of ultrasonic waves, and effectively break up tiny bubbles, so that the emulsification effect of the preparation is more stable and uniform.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A process for preparing a low-foaming adjuvant for a glufosinate-fluoropyralid microemulsion, characterized in that: The preparation process uses a preparation device, which includes a main unit (100), a stirring unit (200), a pre-defoaming unit (300), a vacuum defoaming device (400) and an ultrasonic device (500). The preparation process includes the following steps: S1: pre-mix the low-foaming surfactant and the defoaming agent at room temperature, and slowly add the stabilizer under stirring conditions to further improve the emulsification effect of the auxiliary agent and the stability of the microemulsion; after sufficient mixing, a uniform mixed solution is obtained; S11: starting the motor (207), so that the motor (207) drives the stirring blade (202) on the stirring shaft (201) to rotate, and the stirring blade (202) generates a stirring force in the liquid preparation. The inclined stirring blade (202) causes a violent disturbance of the liquid preparation, so that the liquid preparation is evenly mixed, and the foam generated during the stirring process gradually gathers on the surface of the mixed solution; S12: When the stirring is completed, the motor (207) is paused, and the electric telescopic rod (305) is started to push the defoaming filter bucket (301) down to the surface of the mixed solution, so that the bottom of the feed port is immersed below the liquid level of the mixed solution. At the same time, the driven rack group (203) is driven to descend in height, so that the driven rack group (203) drives the driven gear (204) to rotate, and the driven gear (204) drives the meshing gear (205) to rotate. The two sets of meshing gears (205) drive the corresponding stirring blades (202) to rotate in the opposite direction to a horizontal state through the corresponding blade shafts; S13: The motor (207) is started again, so that the motor (207) drives the stirring shaft (201) to rotate, so that the defoaming filter (301) and the stirring blade (202) rotate synchronously, and the foam on the surface of the liquid preparation enters the defoaming chamber (302) from the feed port, and the defoaming needle (303) arranged on the inner wall of the defoaming chamber (302) pierces the foam to reduce the foam volume, and the bubble collecting chamber (304) prevents the foam from overflowing and effectively converts it into gas or liquid; the stirring blade (202) in a horizontal state can continuously stir the mixed solution, maintain the uniformity of the mixed solution, and is not easy to generate bubbles, and at the same time, optimizes the defoaming effect; S2: After the mixing is completed, the mixed solution is discharged into the vacuum defoaming device (400) through the discharge pipe (103), a low pressure environment is set, and vacuum is continuously drawn to remove tiny bubbles generated during the mixing process, thereby improving the low-foam effect of the preparation; S3: introducing the auxiliary agent mixture in the vacuum defoaming device (400) into the ultrasonic device (500) through a pipeline, and further uniformly distributing the components of the auxiliary agent through ultrasonic technology, thereby ensuring that the components in the mixed solution are effectively combined, improving emulsification and stability, and reducing foam generation; S4: After standing and settling, a low-foaming adjuvant of glufosinate-fluoropyralid microemulsion is obtained; The main unit (100) comprises a stirring barrel (101), and the stirring barrel (101) is connected to a vacuum defoaming device (400) and an ultrasonic device (500) in sequence through a discharge pipe (103); the stirring unit (200) comprises a stirring shaft (201) and a stirring blade (202), wherein the stirring shaft (201) is rotatably mounted in the stirring barrel (101), the stirring blade (202) is fixed on the stirring shaft (201), and the stirring shaft (201) is connected to a motor ( 207); the pre-defoaming unit (300) comprises a defoaming filter bucket (301), the defoaming filter bucket (301) is fixed on the stirring shaft (201), a defoaming chamber (302) is arranged inside the defoaming filter bucket (301), a feed inlet is provided on one side of the defoaming chamber (302), so that during the rotation of the defoaming filter bucket (301), the foam on the surface of the mixed solution enters the defoaming chamber (302) from the feed inlet, and a defoaming needle (303) is arranged on the inner wall of the defoaming chamber (302).

2. The process for preparing the low foaming adjuvant of the glufosinate-fluoropyralid microemulsion according to claim 1, characterized in that: The low-foaming surfactant includes a nonionic or low-foaming anionic surfactant, and the defoaming agent is a polyether or silicone oil defoaming agent.

3. The process for preparing the low foaming adjuvant of the glufosinate-fluoropyralid microemulsion according to claim 2, characterized in that: The stabilizer is a high molecular polymer or modified siloxane to improve the emulsification effect of the auxiliary agent and the stability of the microemulsion.

4. The process for preparing the low foaming adjuvant of the glufosinate-fluoropyralid microemulsion according to claim 3, characterized in that: The weight ratio of the low-foaming surfactant to the defoaming agent and the stabilizer is 5:3:

2.

5. The process for preparing the low foaming adjuvant of the glufosinate-fluoropyralid microemulsion according to claim 4, characterized in that: The uniform mixed liquid after premixing is defoamed in a vacuum defoaming device (400), the defoaming time is 10-30 minutes, and the temperature is controlled at 4-10°C.

6. The process for preparing the low foaming adjuvant of the glufosinate-fluoropyralid microemulsion according to claim 5, characterized in that: The uniform mixed liquid is subjected to ultrasonic emulsification treatment, the ultrasonic frequency is 20-40kHz, and the treatment time is 20 minutes.

7. The process for preparing the low foaming adjuvant of the glufosinate-fluoropyralid microemulsion according to claim 6, characterized in that: A feeding pipe (104) is arranged at the top of the mixing barrel (101), a collecting hopper (102) is connected to the bottom of the mixing barrel (101), and the bottom of the collecting hopper (102) is connected to a discharge pipe (103).

8. The process for preparing the low foaming adjuvant of the glufosinate-fluoropyralid microemulsion according to claim 7, characterized in that: The rear side of the defoaming filter bucket (301) is connected to a concave bubble collecting chamber (304) to prevent foam overflow; the top end of the defoaming filter bucket (301) is connected to an electric telescopic rod (305), the top end of the electric telescopic rod (305) is fixed on a mounting seat, and the mounting seat is fixed on the stirring shaft (201).

9. The process for preparing the low foaming adjuvant of the glufosinate-fluoropyralid microemulsion according to claim 8, characterized in that: The stirring unit (200) further comprises a driven rack group (203), the bottom of the mounting seat is connected to the driven rack group (203), one side of the driven rack group (203) is meshingly connected to a driven gear (204), one side of the driven gear (204) is meshingly connected to a meshing gear (205), the meshing gear (205) is fixed to a blade rotating shaft, the blade rotating shaft is rotatably mounted on a blade hinge seat (206), the blade hinge seat (206) is fixed to the stirring shaft (201), and the blade rotating shaft is fixedly connected to the stirring blade (202).

10. The process for preparing the low foaming adjuvant of the glufosinate-fluoropyralid microemulsion according to claim 9, characterized in that: The stirring blades (202) are provided in two groups. The two groups of stirring blades (202) are arranged in a "V"-shaped structure on both sides of the stirring shaft (201). Each group of stirring blades (202) is connected to a group of blade rotating shafts. Each group of blade rotating shafts is fixedly connected to a group of meshing gears (205). Each group of meshing gears (205) is meshingly connected to a group of driven gears (204). The two groups of meshing gears (205) are arranged on both sides of the driven rack group (203).

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