Three-in-one vacuum system for producing and distilling carfentrazone-ethyl

Abstract

The utility model relates to a three-in-one vacuum system for producing and distilling carfentrazone-ethyl. The vacuum system comprises a water tank and a water ring vacuum pump, the water tank is communicated with a first condenser through a water outlet pipeline, and the first condenser is communicated with the water ring vacuum pump; the water ring vacuum pump is communicated with the vacuum pipeline and an inlet above the water tank; a gap is reserved between the top of the first partition plate and the top in the water tank, and through holes are formed in the bottom and the middle of the first partition plate respectively. A second partition plate is further installed in the water tank, a gap is reserved between the top of the second partition plate and the inner top of the water tank, and a recycling space is formed between the side, away from the first partition plate, of the second partition plate and the inner wall of the water tank and internally provided with a hydraulic pump. A gas outlet is formed in the water tank. The vacuum distillation system has the advantages that water in the water tank can be cooled while the distillation system is vacuumized by the vacuum system, and liquid toluene can be efficiently recovered, so that the vacuum system with three functions is formed, and the solvent toluene is efficiently recovered.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of clomazone preparation, and specifically relates to a three-in-one vacuum system for clomazone production distillation. BACKGROUND

[0002] Clomazone, also known as mefenpyr-diethyl, is a herbicide belonging to the triazolinone class. Its chemical name is 2-chloro-3-{2-chloro-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]-4-fluorophenyl}propionic acid ethyl ester. In the production of clomazone, a vacuum distillation step is required to be performed by a vacuum system. The vacuum is usually achieved by a water ring vacuum pump. However, the water ring vacuum pump will also extract the gas of the solvent toluene during the vacuum process. If the toluene is not recycled, it will be wasted.

[0003] In the prior art, the distillation vacuum system in the production of clomazone recycles toluene during the vacuum process. However, the direct recycling of toluene gas is troublesome, and the condensate toluene is difficult to recycle. During the recycling process, water and toluene are easily extracted together, and need to be recycled again. The recycling efficiency is low. In addition, the water in the water tank is recycled. Since the water works in the water ring vacuum pump and generates heat, the vacuum degree is reduced, which affects the normal work of the water ring pump. Therefore, it needs to be improved. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem of providing a three-in-one vacuum system for clomazone production distillation, which can solve the problems of the prior art, such as the difficulty of recycling liquid toluene during the vacuum process of the vacuum system, the increase of the temperature of the recycled water, the reduction of the vacuum degree, and the influence on the normal work of the water ring pump.

[0005] To solve the above technical problems, the technical scheme of the utility model is as follows: a water tank and a water ring vacuum pump are provided, characterized in that: a water outlet is arranged on the water tank, the water outlet is communicated with the inlet of a first condenser through a water outlet pipeline, and the outlet of the first condenser is communicated with the water inlet of the water ring vacuum pump.

[0006] The air inlet hole of the water ring vacuum pump is communicated with a vacuum pipeline, and the air outlet hole of the water ring vacuum pump is communicated with the inlet above the water tank through an air outlet pipeline.

[0007] A first partition plate is vertically arranged in the water tank, a gap is left between the top of the first partition plate and the inner top of the water tank, and through holes are arranged on the bottom and the middle of the first partition plate.

[0008] The water tank is further provided with a second partition plate arranged vertically, the second partition plate is arranged on the side of the first partition plate away from the water ring vacuum pump, a gap is left between the top of the second partition plate and the inner top of the water tank, a recovery space is formed between the side of the second partition plate away from the first partition plate and the inner wall of the water tank, and the recovery space is provided with a hydraulic pump.

[0009] The water tank is further provided with a second partition plate arranged vertically, the second partition plate is arranged on the side of the first partition plate away from the water ring vacuum pump, a gap is left between the top of the second partition plate and the inner top of the water tank, a recovery space is formed between the side of the second partition plate away from the first partition plate and the inner wall of the water tank, and the recovery space is provided with a hydraulic pump.

[0010] Further, the second condenser is arranged between the gas inlet hole of the water ring vacuum pump and the vacuum pipeline.

[0011] Further, the liquid level meter is arranged in the space between the side of the first partition plate away from the second partition plate and the inner wall of the water tank, and the liquid level meter is also arranged in the recovery space.

[0012] Further, the communication pipeline is arranged between the space between the first partition plate and the second partition plate and the bottom of the recovery space, and the control valve is arranged on the communication pipeline.

[0013] Further, the inlet of the water tank is arranged higher than the top of the first partition plate.

[0014] After the above structure is adopted, the water ring vacuum pump is used for distillation and vacuumizing in the production of carfentrazone-ethyl, the water in the water tank enters the water ring vacuum pump after passing through the first condenser, the temperature of the water is reduced, the vacuum degree is avoided from being reduced, and the normal work of the water ring vacuum pump is ensured.

[0015] The pumped gas enters the water ring vacuum pump through the vacuum pipeline, the gas and water droplets are discharged through the gas outlet and enter the upper side of the water tank, the water and the liquid toluene enter the water tank and are layered, the gaseous toluene is recycled through the gas outlet, the toluene in the upper layer enters the space between the first partition plate and the second partition plate through the space above the first partition plate, the water in the lower layer enters the space between the first partition plate and the second partition plate through the through hole, the toluene and the water in the space between the first partition plate and the second partition plate are layered, the toluene in the upper layer enters the recovery space through the space above the second partition plate, and the toluene in the recovery space is pumped out through the hydraulic pump for recycling, the solvent toluene is conveniently recycled, and the recycling efficiency is high.

[0016] The vacuum system can perform cooling treatment on the water in the water tank while performing vacuumizing on the distillation system, and can conveniently recycle the liquid toluene, thereby forming a vacuum system with three functions, and realizing efficient recycling of the solvent toluene. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the utility model. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further explained in detail in combination with the drawings and specific embodiments. The following embodiments can make the technical personnel of the profession more comprehensively understand the utility model, but the utility model is not limited in the embodiment range.

[0019] As Figure 1 shown, the specific embodiment adopts the following technical scheme: including water tank 1 and water ring vacuum pump 2, water tank 1 is equipped with water outlet, water outlet is communicated with the inlet of first condenser 9 through water outlet pipeline, the outlet of first condenser 9 is communicated with the water inlet of water ring vacuum pump 2, through first condenser 9 to the water in water tank cooling, the water in water tank 1 enters water ring vacuum pump 2 after passing through first condenser 9, avoids the vacuum degree to reduce, ensures the normal work of water ring vacuum pump 2.

[0020] The air inlet hole 21 of water ring vacuum pump 2 is communicated with the vacuum pipeline, and the air inlet hole 21 of water ring vacuum pump 2 and the vacuum pipeline are provided with the second condenser 10, the gas is cooled by the second condenser 10, and the temperature is too high to cause the vacuum degree of water ring vacuum pump 2 to drop.

[0021] The exhaust hole 22 of water ring vacuum pump 2 is communicated with the inlet above water tank 1 through the exhaust pipeline, and the gas and water droplets discharged by water ring vacuum pump 2 enter water tank 1 through the exhaust pipeline, and the water tank 1 is provided with a gas outlet, and the toluene gas entering the exhaust pipeline is discharged through the gas outlet for collection.

[0022] The first partition plate 3 vertically arranged in the water tank 1, the top of the first partition plate 3 and the inner top of the water tank 1 are left with a gap, the bottom and the middle part of the first partition plate 3 are respectively provided with through holes 5, and the inlet of the water tank 1 is higher than the top of the first partition plate 3.

[0023] The second partition plate 4 vertically arranged in the water tank 1, the second partition plate 4 is arranged on the side away from the water ring vacuum pump 2 of the first partition plate 3, the top of the second partition plate 4 and the inner top of the water tank 1 are left with a gap, the water and liquid toluene enter the water tank 1 and stratify, the toluene in the upper layer enters between the first partition plate 3 and the second partition plate 4 from above the first partition plate 3, and the water below enters between the first partition plate 3 and the second partition plate 4 through the through hole 5, and the space formed between the side away from the second partition plate 4 of the first partition plate 3 and the inner wall of the water tank 1 is provided with a liquid level meter 7.

[0024] The recovery space is formed between the side of the second partition plate 4 away from the first partition plate 3 and the inner wall of the water tank 1. After the toluene and water are layered between the first partition plate 3 and the second partition plate 4, the toluene above enters the recovery space above the second partition plate 4. The hydraulic pump 6 is arranged in the recovery space. The toluene in the recovery space is extracted by the hydraulic pump 6 for recycling. The liquid level meter 7 is arranged in the recovery space. Whether the hydraulic pump 6 is started is determined according to the liquid level metering of the liquid level meter 7. When the liquid level exceeds 2 / 3 of the height of the second partition plate 4, the hydraulic pump 6 is started to extract the toluene. The recovery of the solvent toluene is convenient, and the recovery efficiency is high.

[0025] A communication pipeline is arranged between the space formed between the first partition plate 3 and the second partition plate 4 and the bottom of the recovery space. The control valve 8 is arranged on the communication pipeline.

[0026] The first condenser 9, the second condenser 10, the water ring vacuum pump 2, the hydraulic pump 6, the liquid level meter 7, the control valve 8 and the like described above are all general standard parts or parts known to those skilled in the art. Their structures and principles can be known by those skilled in the art through technical manuals or through conventional experimental methods, and will not be described.

[0027] Working principle: The water ring vacuum pump 2 is used for distillation vacuum extraction in amicarbazone production. The water in the water tank 1 enters the water ring vacuum pump 2 after passing through the first condenser 9, so as to reduce the temperature of the water and avoid the decrease of the vacuum degree. The extracted gas enters the water ring vacuum pump 2 through the vacuum pipeline, is cooled by the second condenser 10, so as to avoid the decrease of the vacuum degree of the water ring vacuum pump 2 due to the excessively high temperature, and ensure the normal work of the water ring vacuum pump 2. The gas and water droplets are discharged from the exhaust hole 22 into the upper part of the water tank 1. The water and the liquid toluene enter the water tank 1 and are layered. The gaseous toluene is recycled through the gas outlet. The toluene in the upper layer enters between the first partition plate 3 and the second partition plate 4 above the first partition plate 3. The water below enters between the first partition plate 3 and the second partition plate 4 through the through hole 5. After the toluene and water are layered between the first partition plate 3 and the second partition plate 4, the toluene above enters the recovery space above the second partition plate 4. The toluene in the recovery space is extracted by the hydraulic pump 6 for recycling. The recovery of the solvent toluene is convenient, and the recovery efficiency is high. The vacuum system can perform the cooling treatment of the water in the water tank 1 while performing the vacuum extraction on the distillation system, and can conveniently recycle the liquid toluene, forming a vacuum system with three functions, and realizing the efficient recycling of the solvent toluene.

[0028] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A three-in-one vacuum system for the distillation of production of carfentrazone-ethyl, comprising a water tank and a water ring vacuum pump, characterized in that: The water tank is provided with a water outlet, which is communicated with the inlet of the first condenser through a water outlet pipeline, and the outlet of the first condenser is communicated with the water inlet of the water ring vacuum pump; The air inlet hole of the water ring vacuum pump is communicated with a vacuum pipeline, and the air outlet hole of the water ring vacuum pump is communicated with the inlet above the water tank through an air outlet pipeline; A first partition plate is vertically arranged in the water tank, and a gap is left between the top of the first partition plate and the inner top of the water tank, and the bottom and middle of the first partition plate are respectively provided with through holes; A second partition plate is also vertically arranged in the water tank, and the second partition plate is arranged on the side of the first partition plate away from the water ring vacuum pump, a gap is left between the top of the second partition plate and the inner top of the water tank, and a recovery space is formed between the side of the second partition plate away from the first partition plate and the inner wall of the water tank, and a hydraulic pump is arranged in the recovery space; The water tank is provided with a gas outlet.

2. The triple vacuum system for distillation for production of clomazone according to claim 1, characterized in that: A second condenser is arranged between the air inlet hole of the water ring vacuum pump and the vacuum pipeline.

3. The triple vacuum system for distillation for production of clomazone according to claim 1, characterized in that: A liquid level meter is arranged in the space formed between the side of the first partition plate away from the second partition plate and the inner wall of the water tank, and a liquid level meter is also arranged in the recovery space.

4. The triple vacuum system for distillation for production of clomazone according to claim 1, characterized in that: A communication pipeline is arranged between the space formed between the first partition plate and the second partition plate and the bottom of the recovery space, and a control valve is arranged on the communication pipeline.

5. The triple vacuum system for distillation for production of clomazone according to claim 1, characterized in that: The inlet of the water tank is arranged higher than the top of the first partition plate.

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