Filtering and purifying equipment and filtering method for preparing refined glufosinate-ammonium

Abstract

The invention discloses filtering and purifying equipment for preparing refined glufosinate-ammonium and a filtering method, and relates to the field of refined glufosinate-ammonium filtering and purifying, the filtering and purifying equipment comprises a cylinder pipe, a liquid inlet pipe and a liquid outlet pipe are respectively arranged at two ends of the cylinder pipe in a penetrating manner, the liquid outlet pipe extends into the cylinder pipe in a penetrating manner to form an inner extending pipe, and the inner wall of the cylinder pipe is provided with a ring wall with a reduced diameter; the filter shell is arranged between the annular wall and the inward extending pipe, the annular surface of the filter shell is provided with a filter screen, so that a filter gap is formed between the annular surface of the filter shell and the inner wall of the bobbin, the diameter of one end, close to the annular wall, of the filter shell is larger than the inner diameter of the annular wall, the other end of the filter shell is provided with a sleeve shell, and the sleeve shell and the inward extending pipe slide in a sealed mode; the end part of the filter shell abuts against the annular wall; fine glufosinate-ammonium reaction liquid is conducted into the straight-through type cylinder pipe in a pressurized mode through the booster pump, the reaction liquid is filtered and purified through the filter shell, the device can be directly arranged between adjacent production procedures of fine glufosinate-ammonium, and rapid and safe filtering and purifying work can be achieved without independent procedures.

Description

Technical Field

[0001] The invention relates to the field of filtration and purification of refined glufosinate ammonium, and in particular to filtration and purification equipment and a filtration method for preparing refined glufosinate ammonium. Background Art

[0002] Glufosinate ammonium is used as a highly effective herbicide. Glufosinate ammonium is a glutamine synthetase inhibitor, which causes the accumulation of ammonium ions in plants and inhibits photosynthesis, thereby achieving a weed control effect. The preparation of glufosinate ammonium has multiple reaction links. After the reaction of the raw materials is completed, the reaction liquid needs to be filtered and purified before being introduced into the next processing link. The purpose of filtration and purification is to remove unreacted raw materials in the reaction liquid and insoluble substances produced by the reaction, thereby improving the purity of the reaction substances.

[0003] The filtration and purification of the reaction materials of refined glufosinate ammonium is generally achieved through an independent filtration process, which not only adds a link in the process, but also requires a larger capacity filtration equipment to ensure the single processing volume, making it difficult to achieve continuous filtration and purification between adjacent processing links. In addition, the airtightness of the equipment needs to be ensured during the preparation of refined glufosinate ammonium, and the use of an independent filtration link increases the safety hazard of leakage. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art problems, the purpose of the present invention is to provide a filtration and purification device and a filtration method for preparing refined glufosinate ammonium, which is used to solve the problems that the traditional independent filtration process in the preparation of refined glufosinate ammonium increases the complexity of the preparation process, the filtration and purification efficiency is low, and there are high safety risks in production.

[0005] In order to solve the problems of the prior art, the technical solution of the present invention is as follows: The filtering and purification equipment for preparing refined glufosinate-ammonium comprises a barrel, wherein a liquid inlet pipe and a liquid outlet pipe are respectively provided at both ends of the barrel, wherein an inner tube is extended through the liquid outlet pipe into the barrel, and the inner wall of the barrel has a ring wall with a reduced diameter; A filter housing, the filter housing is arranged between the annular wall and the inner tube, a filter screen is arranged on the annular surface of the filter housing, so that a filtering gap is formed between the annular surface of the filter housing and the inner wall of the tube, the diameter of one end of the filter housing close to the annular wall is larger than the inner diameter of the annular wall, the other end of the filter housing is provided with a sleeve, the sleeve and the inner tube are sealed and slidable, a spring is arranged between the filter housing and the tube, so that the end of the filter housing is against the annular wall; A booster pump is connected to the liquid inlet pipe and is used to transport liquid into the barrel through the liquid inlet pipe and out of the barrel through the liquid outlet pipe.

[0006] Preferably, a fan blade is concentrically fixed to one end of the filter housing close to the annular wall.

[0007] Preferably, the blades of the fan blade are distributed at the edge of the fan blade, and the middle of the fan blade has a conical surface pointing to the liquid inlet pipe.

[0008] Preferably, a spiral plate is provided on the inner wall of the barrel in the filtering gap, and the plate surface of the spiral plate is inclined toward the direction of the liquid outlet pipe.

[0009] Preferably, the diameter of the filter housing gradually decreases from the liquid inlet pipe to the liquid outlet pipe, and the inner circle contour of the spiral plate remains parallel to the filter housing, so that when the filter housing moves toward the liquid outlet pipe, the gap between the filter housing and the spiral plate gradually decreases.

[0010] Preferably, the diameter of one end of the barrel located at the liquid outlet pipe is enlarged to form an expansion shell, the expansion shell is connected to the first outer conduit, the liquid outlet pipe is connected to the second outer conduit, a transverse tube is connected between the first outer conduit and the second outer conduit, a waste pipe is connected to the middle of the transverse tube, a plunger is slidably adapted in the transverse tube, the plunger can seal and block the waste pipe, the plunger is connected to a spring for applying pressure to the plunger in the direction of the first outer conduit.

[0011] Preferably, a stud is threadedly penetrated at the end of the transverse tube, a stopper is connected to the inner end of the stud, and a spring for applying pressure to the plunger is arranged between the plunger and the stopper.

[0012] Preferably, the end of the first outer conduit is sealed by a threaded plug.

[0013] A method for preparing and filtering refined glufosinate ammonium using the filtering and purification equipment for preparing refined glufosinate ammonium, the specific steps of which are as follows: A. The input end of the booster pump is connected to the reaction process of preparing refined glufosinate ammonium, and the liquid outlet pipe is connected to the next process of the refined glufosinate ammonium reaction process. The elastic force causes the end face of the filter housing to collide with the ring wall, so that the internal chamber of the barrel is in a blocked state; B. The reaction liquid of glufosinate-ammonium is pressurized and introduced into the barrel by a booster pump. The filter housing moves toward the liquid outlet pipe under the action of the liquid pressure. The filter housing is separated from the ring wall to make the internal chamber of the barrel connected. The reaction liquid enters the filter housing through the filter screen on the ring surface of the filter housing and is discharged from the liquid outlet pipe. The insoluble substances in the reaction liquid are retained on the outside of the filter housing. C. When the booster pump stops guiding the liquid, the filter housing is acted upon by elastic force to contact the annular wall again to block the inner chamber of the tube, so that the filtered insoluble substances are gathered on the side of the annular wall close to the liquid outlet pipe.

[0014] Compared with the prior art, the advantages of the present invention are as follows: 1. The present invention conducts the refined glufosinate-ammonium reaction liquid to a straight-through barrel by means of a booster pump, and filters and purifies the reaction liquid through a filter shell. The device can be directly arranged between adjacent production processes of refined glufosinate-ammonium, and rapid and safe filtration and purification can be achieved without setting up independent processes.

[0015] 2. The present invention drives the fan blades to rotate the filter housing through liquid flow, so that the spiral plate can peel off the filtered material retained on the outside of the filter housing and conduct the filtered material to the end, which can maintain the high permeability of the filter housing and facilitate the centralized collection of the filtered material.

[0016] 3. The present invention uses the two ends of the plunger to withstand the pressure changes inside and outside the filter housing. The pressure changes feed back the aggregation density of the filtered matter. The pressure changes will cause the plunger to move, and the waste pipe can be automatically opened to discharge the filtered matter, thereby realizing the automatic cleaning function. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of the filter housing of the present invention with the closed chamber opened.

[0019] Figure 3 This is a schematic diagram of the structure of the filter housing of the present invention with the barrel chamber opened.

[0020] Figure 4 It is a schematic diagram of the internal structure of the bobbin of the present invention.

[0021] Figure 5 It is a schematic diagram of the connection structure of the first outer conduit, the second outer conduit and the cross pipe of the present invention.

[0022] Figure numerals: 1. bobbin; 11. liquid inlet pipe; 12. liquid outlet pipe; 13. expansion shell; 14. ring wall; 15. inner tube; 2. booster pump; 3. filter shell; 31. sleeve shell; 4. fan blade; 41. conical surface; 5. spiral plate; 6. first outer conduit; 61. plug; 7. second outer conduit; 8. cross pipe; 81. waste pipe; 82. plunger; 83. block; 84. stud. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] The filtration and purification equipment is directly connected between the liquid delivery pipelines of the adjacent processes of refined glufosinate ammonium, and directly filters and purifies the reaction liquid when transmitting the reaction liquid to the next process, such as Figure 1 , Figure 4 As shown, the filtering and purifying device is composed of a cylindrical tube 1 as the main body, with a liquid inlet pipe 11 and a liquid outlet pipe 12 respectively connected at the left and right ends of the tube 1, an inner tube 15 is fixed at the right end of the tube 1 and aligned with the liquid outlet pipe 12, and a ring wall 14 with a reduced diameter is formed on the left side of the tube 1; like Figure 2 , Figure 3As shown, the filter housing 3 is cylindrical, the annular surface of the filter housing 3 is a filter screen, the right end surface of the filter housing 3 has a sleeve 31 extending inwardly, the filter housing 3 is placed between the annular wall 14 and the inner tube 15, the diameter of the left end surface of the filter housing 3 is larger than the inner diameter of the annular wall 14, the sleeve 31 is slidably sleeved on the outside of the inner tube 15, and a sealing ring is used for sliding sealing, so that the filter housing 3 can slide axially along the inner tube 15, a spring is arranged at the right end of the filter housing 3 to connect with the barrel 1, and a leftward pressure is applied to the filter housing 3, so that the left end surface of the filter housing 3 contacts the annular wall 14, the internal chamber of the barrel 1 is blocked, and a filtering gap is formed between the annular surface of the filter housing 3 and the inner wall of the barrel 1; The input end of the booster pump 2 is connected to the preparation reaction process of refined glufosinate-ammonium, and the output end of the booster pump 2 is connected to the liquid inlet pipe 11; During the preparation and processing of refined glufosinate ammonium, when the reaction liquid of refined glufosinate ammonium has fully reacted, the booster pump 2 is turned on to drive the reaction liquid to be conducted to the next process. During the conduction process, the reaction liquid first enters the barrel 1 through the liquid inlet pipe 11, and the hydraulic pressure at the left end of the barrel 1 gradually increases. The expansion shell 13 is pushed to the right by the hydraulic pressure to overcome the elastic force and move. The filter housing 3 is separated from the annular wall 14, so that the reaction liquid enters the filtration gap. The reaction liquid is filtered through the filter screen of the filter housing 3 and enters the filter housing 3, and then is introduced into the next process through the inner extension pipe 15 and the liquid outlet pipe 12. The insoluble substances in the reaction liquid are retained on the outside of the filter housing 3. This method can continuously filter and purify the reaction liquid entering the next process. When the filtration work is stopped, the elastic force causes the filter housing 3 to move to the left and fit with the annular wall 14 again to block the internal chamber of the barrel 1. The filtered substances are gathered on the right side of the annular wall 14 to avoid backflow of the filtered substances, and it is also convenient to discharge the filtered substances in a concentrated manner.

[0025] In order to prevent the outside of the filter housing 3 from being blocked by continuously accumulated insoluble substances during continuous filtering, the surface of the filter housing 3 needs to be cleaned, and the operation is as follows: like Figure 2 , Figure 3 As shown, a fan blade 4 is concentrically fixed at one end of the filter housing 3 close to the annular wall 14, and the blades of the fan blade 4 are distributed at the edge of the fan blade 4. A spiral plate 5 is fixedly arranged on the inner wall of the cylinder tube 1 in the filter gap; When the booster pump 2 increases the pressure to introduce the reaction liquid, the fan blade 4 is impacted by the reaction liquid to drive the filter housing 3 to rotate, and the insoluble substances gathered outside the filter housing 3 are peeled off by the spiral plate 5 and conducted to the right side, which not only prevents the outside of the filter housing 3 from being blocked by excess substances, but also allows the filtered substances to gather to the right for easy centralized cleaning; The middle part of the fan blade 4 has a conical surface 41 pointing to the liquid inlet pipe 11. The conical surface 41 is used to disperse the reaction liquid to the surroundings so that the reaction liquid can fully drive the fan blade 4 to drive the filter housing 3 to rotate. The plate surface of the spiral plate 5 is inclined in the direction of the liquid outlet pipe 12, which can effectively prevent the backflow of the material conducted to the right by the filter housing 3.

[0026] like Figure 2 , Figure 3 As shown, the diameter of the filter housing 3 gradually decreases from the liquid inlet pipe 11 to the liquid outlet pipe 12, and the inner circle profile of the spiral plate 5 remains parallel to the filter housing 3, so that when the filter housing 3 moves toward the liquid outlet pipe 12, the gap between the filter housing 3 and the spiral plate 5 gradually decreases, and the peeling strength of the spiral plate 5 on the filter material outside the filter housing 3 is gradually increased.

[0027] Since the filtered insoluble substances are gathered on the right side of the barrel 1, when the substances gather to a certain extent, it will greatly affect the filtering and purification work. The filtering and purification equipment has the function of automatically cleaning the filtered substances. The specific operation is as follows: like Figure 2 , Figure 3 , Figure 5 As shown, the diameter of the right end of the barrel 1 is enlarged to form an expansion shell 13, the expansion shell 13 is connected to the first outer conduit 6, the liquid outlet pipe 12 is connected to the second outer conduit 7, the transverse pipe 8 is connected between the first outer conduit 6 and the second outer conduit 7, the middle of the transverse pipe 8 is connected to the waste discharge pipe 81, and a plunger 82 is slidably adapted in the transverse pipe 8. The length of the plunger 82 is greater than the diameter of the waste discharge pipe 81, so that the plunger 82 can seal and block the waste discharge pipe 81. A spring is provided on the right side of the plunger 82 and connected to the transverse pipe 8 to apply pressure to the plunger 82 in the direction of the first outer conduit 6; During the filtration of the refined glufosinate-ammonium reaction liquid, the pressure outside the filter housing 3 and the pressure inside the first outer conduit 6 and the expansion housing 13 are all P1, and the pressure inside the filter housing 3 and the liquid outlet pipe 12 is P2, P1>P2; The pressure on the left side of the plunger 82 is P1, and the pressure on the right side of the plunger 82 is P2 plus the elastic force of the spring. During normal filtering operation, the two sides of the plunger 82 are subjected to a balanced force, so that the plunger 82 keeps blocking the waste pipe 81. As too much filtrate gathers on the right side of the barrel 1, the overall filtration permeability of the filter housing 3 gradually decreases, P1 gradually increases, and P2 gradually decreases, so that the plunger 82 gradually compresses the spring and moves to the right. When the difference between P1 and P2 reaches a certain level, the plunger 82 moves to open the waste pipe 81, so that the filtrate on the right side of the barrel 1 follows the liquid through the first outer conduit 6, the transverse tube 8, and the waste pipe 81 to be discharged, thereby reducing the density of the filtrate and gradually improving the permeability of the filter housing 3. The difference between P1 and P2 gradually returns to an appropriate range, and the plunger 82 gradually moves to the left to block the waste pipe 81, maintaining a normal filtering mode.

[0028] like Figure 5 As shown, a stud 84 is threaded through the end of the cross tube 8, and a stopper 83 is connected to the inner end of the stud 84. A spring for applying pressure to the plunger 82 is arranged between the plunger 82 and the stopper 83. The position of the stopper 83 against the spring is moved by rotating the stud 84 to adjust the pressure applied by the spring to the plunger 82. The plunger 82 can be adjusted to maintain a suitable position in the cross tube 8 according to the working conditions.

[0029] like Figure 5 As shown, the end of the first outer conduit 6 is sealed by a threaded plug 61, and the first outer conduit 6 can be manually cleaned by rotating the plug 61.

[0030] The method for preparing and filtering refined glufosinate-ammonium using the above-mentioned filtering and purification equipment comprises the following specific steps: A. The input end of the booster pump 2 is connected to the reaction process of preparing refined glufosinate ammonium, and the liquid outlet pipe 12 is connected to the next process of the refined glufosinate ammonium reaction process. The elastic force causes the end face of the filter housing 3 to collide with the annular wall 14, so that the internal chamber of the barrel 1 is in a blocked state; B. The reaction liquid of glufosinate-ammonium is pressurized and introduced into the barrel 1 by the booster pump 2. The filter housing 3 moves toward the liquid outlet pipe 12 under the action of the liquid pressure. The filter housing 3 is separated from the annular wall 14 so that the internal chamber of the barrel 1 is connected. The reaction liquid enters the interior of the filter housing 3 through the filter screen on the annular surface of the filter housing 3 and is then discharged from the liquid outlet pipe 12. The insoluble substances in the reaction liquid are retained on the outside of the filter housing 3. C. When the booster pump 2 stops guiding the liquid, the filter housing 3 is acted upon by the elastic force to contact the annular wall 14 again to block the inner chamber of the barrel 1, so that the filtered insoluble substances are gathered on the side of the annular wall 14 close to the liquid outlet pipe 12.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filtering and purification device for preparing refined glufosinate-ammonium, characterized in that: include: A tube (1), wherein a liquid inlet pipe (11) and a liquid outlet pipe (12) are respectively provided at both ends of the tube (1), wherein an inner tube (15) is provided on the liquid outlet pipe (12) and extends into the tube (1), and the inner wall of the tube (1) has an annular wall (14) with a reduced diameter; A filter housing (3), the filter housing (3) being arranged between the annular wall (14) and the inner tube (15), a filter screen being arranged on the annular surface of the filter housing (3) so that a filtering gap is formed between the annular surface of the filter housing (3) and the inner wall of the tube (1), the diameter of one end of the filter housing (3) close to the annular wall (14) being larger than the inner diameter of the annular wall (14), the other end of the filter housing (3) being provided with a sleeve (31), the sleeve (31) and the inner tube (15) being sealed and slidable, a spring being arranged between the filter housing (3) and the tube (1) so that the end of the filter housing (3) is in contact with the annular wall (14); A booster pump (2) is connected to the liquid inlet pipe (11) and is used to transport liquid into the barrel (1) through the liquid inlet pipe (11) and to discharge liquid out of the barrel (1) through the liquid outlet pipe (12).

2. The filtering and purification equipment for preparing refined glufosinate-ammonium according to claim 1, characterized in that: A fan blade (4) is coaxially fixed to one end of the filter housing (3) close to the annular wall (14).

3. The filtering and purification equipment for preparing refined glufosinate-ammonium according to claim 2, characterized in that: The blades of the fan blade (4) are distributed at the edge of the fan blade (4), and the middle of the fan blade (4) has a conical surface (41) pointing towards the liquid inlet pipe (11).

4. The filtering and purification equipment for preparing refined glufosinate-ammonium according to claim 2, characterized in that: The inner wall of the barrel (1) is provided with a spiral plate (5) in the filtering gap, and the plate surface of the spiral plate (5) is inclined in the direction of the liquid outlet pipe (12).

5. The filtering and purification equipment for preparing refined glufosinate-ammonium according to claim 4, characterized in that: The diameter of the filter housing (3) gradually decreases in the direction from the liquid inlet pipe (11) to the liquid outlet pipe (12), and the inner circle profile of the spiral plate (5) remains parallel to the filter housing (3), so that when the filter housing (3) moves in the direction of the liquid outlet pipe (12), the gap between the filter housing (3) and the spiral plate (5) gradually decreases.

6. The filtering and purification equipment for preparing refined glufosinate-ammonium according to claim 1, characterized in that: The diameter of one end of the barrel (1) located at the liquid outlet pipe (12) is enlarged to form an expansion shell (13); the expansion shell (13) is connected to a first outer conduit (6); the liquid outlet pipe (12) is connected to a second outer conduit (7); a transverse pipe (8) is connected between the first outer conduit (6) and the second outer conduit (7); a waste discharge pipe (81) is connected to the middle of the transverse pipe (8); a plunger (82) is slidably adapted in the transverse pipe (8); the plunger (82) can seal and block the waste discharge pipe (81); and a spring is connected to the plunger (82) for applying pressure to the plunger (82) in the direction of the first outer conduit (6).

7. The filtering and purification equipment for preparing refined glufosinate-ammonium according to claim 6, characterized in that: A stud (84) is threadedly penetrated at the end of the transverse tube (8), a stopper (83) is connected to the inner end of the stud (84), and a spring for applying pressure to the plunger (82) is arranged between the plunger (82) and the stopper (83).

8. The filtering and purification equipment for preparing refined glufosinate-ammonium according to claim 6, characterized in that: The end of the first outer conduit (6) is sealed by a threaded plug (61).

9. A method for preparing and filtering refined glufosinate ammonium using the filtering and purifying device for preparing refined glufosinate ammonium according to any one of claims 1 to 8, characterized in that: The specific steps are as follows: A. The input end of the booster pump (2) is connected to the reaction process of preparing refined glufosinate ammonium, and the liquid outlet pipe (12) is connected to the next process of the refined glufosinate ammonium reaction process. The elastic force causes the end surface of the filter housing (3) to collide with the annular wall (14), so that the internal chamber of the barrel (1) is in a blocked state; B. The reaction liquid of glufosinate ammonium is pressurized and introduced into the barrel (1) by a booster pump (2). The filter housing (3) moves toward the liquid outlet pipe (12) under the action of the liquid pressure. The filter housing (3) is separated from the annular wall (14) so ​​that the internal chamber of the barrel (1) is connected. The reaction liquid passes through the filter screen on the annular surface of the filter housing (3) and enters the interior of the filter housing (3) and is then discharged from the liquid outlet pipe (12). Insoluble substances in the reaction liquid are retained on the outside of the filter housing (3); C. When the booster pump (2) stops guiding the liquid, the filter housing (3) is elastically acted upon to contact the annular wall (14) again to block the inner chamber of the tube (1), so that the filtered insoluble matter is gathered on the side of the annular wall (14) close to the liquid outlet pipe (12).

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