Glufosinate-ammonium mother liquor decolorizing device

Abstract

According to the glufosinate-ammonium mother liquor decolorizing device provided by the invention, the glufosinate-ammonium mother liquor is decolorized by arranging the resin adsorption device, and the resin column in the resin adsorption device is filled with the resin, so that the glufosinate-ammonium mother liquor decolorizing device has the characteristics of large treatment capacity, easiness in regeneration and high cyclic utilization rate during decolorizing; the problems that the amount of generated hazardous waste is large and the hazardous waste is not easy to treat due to the fact that the usage amount is large and regeneration is not easy after adsorption saturation when activated carbon is adopted for decolorizing glufosinate-ammonium mother liquor wastewater in the prior art are solved. A first resin column and a second resin column in the resin adsorption device are connected with the mother liquor storage tank, the decolorizing mother liquor storage tank, the backflushing liquid storage tank and the solvent storage tank through a plurality of valves respectively, and the other resin column can continue to work when the first resin column or the second resin column is subjected to backflushing regeneration through control of the valves; and the continuous decoloring process is effectively ensured.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of mother liquor treatment, in particular to a glufosinate-ammonium mother liquor decoloring device. BACKGROUND

[0002] Glufosinate is a high-efficiency, broad-spectrum and contact-kill herbicide, which belongs to an organic phosphine herbicide, and has the advantages of low toxicity, harmlessness and easy degradation.

[0003] There are two main process routes for the industrial production of glufosinate, namely, a thermal cracking ACA process and a Strecker process. Since the related technologies of the Strecker process are relatively mature, the Strecker process is adopted in the method for producing glufosinate in China. In the Strecker process, diethyl methyl phosphite is used as a raw material, Michael addition reaction is performed between acrolein and the acetal generated by the reaction of acrolein and ethanol and diethyl methyl phosphite, 3-ethoxymethyl phosphonoacrolein is obtained after acidification, Strecker reaction is performed by adding sodium cyanide, ammonium chloride and ammonia water, and glufosinate is obtained through hydrolysis, ammoniation and purification. The purity of the glufosinate obtained by the process can reach 95%, and the total yield is more than 30%. In the glufosinate purification process, crystallization is an essential way due to the characteristics of easy operation and large processing capacity. A small amount of glufosinate and other by-products are still present in the glufosinate mother liquor obtained after crystallization, and the solvent in the mother liquor also needs to be recovered to avoid waste. However, the by-products generated in the ammoniation reaction of glufosinate can cause the color of the mother liquor to turn yellow or even brown, which makes it difficult to perform subsequent desalting and recovery processes, and is not conducive to resource recycling. Therefore, it is necessary to decolorize the mother liquor before treatment. The traditional decolorization method is to use activated carbon to decolorize the mother liquor. However, the use amount of activated carbon is large, and it is not easy to regenerate after adsorption saturation, resulting in a large amount of hazardous waste and difficult treatment of the hazardous waste. CONTENT OF THE UTILITY MODEL

[0004] The application provides a glufosinate mother liquor decoloring device to solve the problems of large use amount, difficult regeneration after adsorption saturation, large amount of hazardous waste and difficult treatment of the hazardous waste in the existing decolorization of glufosinate mother liquor wastewater by using activated carbon.

[0005] The application provides a glufosinate mother liquor decoloring device, which comprises a mother liquor storage tank, and the mother liquor storage tank is connected with a decolorized mother liquor storage tank through at least one set of resin adsorption device.

[0006] The resin adsorption device comprises a first resin column and a second resin column, a mother liquor storage tank is connected with material input ends of the first resin column and the second resin column through first and second valves respectively, and a decolorized mother liquor storage tank is connected with material output ends of the first resin column and the second resin column through third and fourth valves respectively.

[0007] The material input ends of the first resin column and the second resin column are connected in sequence through fifth and sixth valves.

[0008] The material output ends of the first resin column and the second resin column are connected in sequence through seventh and eighth valves.

[0009] The fifth and sixth valves are connected with a backflushing liquid storage tank through a pipeline, and the seventh and eighth valves are connected with a solvent storage tank through a pipeline.

[0010] Optionally, the backflushing liquid storage tank is connected with the solvent storage tank through a purification device.

[0011] Optionally, the purification device comprises, in sequence, a distillation device, a condenser, a vacuum unit and a tail gas treatment device.

[0012] The condenser is further connected with the solvent storage tank.

[0013] Optionally, the input end of the first resin column is provided with a first colorimetric detector, and the output end is provided with a second colorimetric detector.

[0014] The input end of the second resin column is provided with a third colorimetric detector, and the output end is provided with a fourth colorimetric detector.

[0015] Optionally, the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the first colorimetric detector, the second colorimetric detector, the third colorimetric detector and the fourth colorimetric detector are electrically connected with a controller.

[0016] Optionally, the first resin column comprises a cylinder body and end covers for closing upper and lower ends of the cylinder body, and the two ends of the cylinder body are separated from the end covers at the two ends by a partition plate.

[0017] At least one decolorizing pipe is arranged in the cylinder body, and the decolorizing pipe passes through the partition plate to communicate the end covers at the upper and lower ends.

[0018] The upper and lower ends of the decolorizing pipe are covered by pipe covers provided with through holes, the pipe covers are detachably connected with the decolorizing pipe, and the decolorizing pipe comprises, in sequence from top to bottom, a first filter layer, a resin layer and a second filter layer.

[0019] An upper portion of a side surface of the cylinder body is provided with a heat exchange medium outlet, and a lower portion of the side surface is provided with a heat exchange medium outlet.

[0020] Optionally, the end cover at the upper end is provided with a retention layer.

[0021] The glufosinate ammonium mother liquor decolorizing device provided by the application decolorizes the glufosinate ammonium mother liquor through the resin adsorption device, the resin column in the resin adsorption device is filled with resin, and when decolorization is performed, the resin adsorption device has the characteristics of large treatment capacity, easy regeneration, and high recycling rate, and overcomes the problems that the traditional method of using activated carbon to decolorize the glufosinate ammonium mother liquor wastewater has a large usage amount, is not easy to regenerate after adsorption saturation, and results in a large amount of hazardous waste that is difficult to handle. In the application, the first resin column and the second resin column in the resin adsorption device are respectively connected with the mother liquor storage tank, the decolorized mother liquor storage tank, the backflushing liquid storage tank, and the solvent storage tank through a plurality of valves, so that when the first resin column or the second resin column is regenerated by backflushing, the other resin column can continue to work, thereby effectively ensuring the continuous performance of the decolorization process. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0023] Figure 1 The schematic diagram of the glufosinate ammonium mother liquor decolorizing device provided by an embodiment of the application is shown in the figure.

[0024] Figure 2 The schematic diagram of the glufosinate ammonium mother liquor decolorizing device provided by another embodiment of the application is shown in the figure.

[0025] Figure 3 The schematic diagram of the purification device provided by an embodiment of the application is shown in the figure.

[0026] Figure 4 The schematic diagram of the glufosinate ammonium mother liquor decolorizing device provided by another embodiment of the application is shown in the figure.

[0027] Figure 5 The structural schematic diagram of the first resin column provided by an embodiment of the application is shown in the figure.

[0028] Figure 6 The structural schematic diagram of the decolorizing pipe provided by an embodiment of the application is shown in the figure.

[0029] Explanation of reference signs:

[0030] 1, mother liquor storage tank; 2, resin adsorption device; 3, decolorized mother liquor storage tank; 4, back flushing liquid storage tank; 5, solvent storage tank; 6, purification device; 7, controller; 21, first resin column; 22, second resin column; 10, first colorimetric detector; 20, second colorimetric detector; 30, third colorimetric detector; 40, fourth colorimetric detector; 61, distillation device; 62, condenser; 63, vacuum unit; 64, tail gas treatment device; 211, cylinder; 212, head; 213, baffle; 214, decolorizing pipe; 100, first valve; 200, second valve; 300, third valve; 400, fourth valve; 500, fifth valve; 600, sixth valve; 700, seventh valve; 800, eighth valve; 2121, interception layer; 2141, pipe cover; 2142, first filter layer; 2143, resin layer; 2144, second filter layer. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are clearly and completely described below. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0032] As shown in the accompanying drawings, Figure 1 the present application provides a device for decolorizing glufosinate-ammonium mother liquor, which comprises a mother liquor storage tank 1, the mother liquor storage tank 1 being connected with a decolorized mother liquor storage tank 3 through at least one set of resin adsorption device 2;

[0033] The resin adsorption device 2 comprises a first resin column 21 and a second resin column 22, and the mother liquor storage tank 1 is connected with the material input ends of the first resin column 21 and the second resin column 22 through a first valve 100 and a second valve 200 respectively; the decolorized mother liquor storage tank 3 is connected with the material output ends of the first resin column 21 and the second resin column 22 through a third valve 300 and a fourth valve 400 respectively;

[0034] The material input ends of the first resin column 21 and the second resin column 22 are connected in sequence through a fifth valve 500 and a sixth valve 600;

[0035] The material output ends of the first resin column 21 and the second resin column 22 are connected in sequence through a seventh valve 700 and an eighth valve 800;

[0036] The fifth valve 500 and the sixth valve 600 are connected with a back flushing liquid storage tank 4 through a pipeline, and the seventh valve 700 and the eighth valve 800 are connected with a solvent storage tank 5 through a pipeline.

[0037] In the present application, when the resin adsorption device 2 is provided in multiple groups, the multiple groups of resin adsorption devices 2 are connected in parallel.

[0038] In use of the device of the present application, the first valve 100 and the third valve 300 are opened, and the remaining valves are kept in a closed state. The mother liquor is transferred from the mother liquor storage tank 1, passes through the first valve 100, and then enters the first resin column 21 for decolorization.

[0039] The decolorized mother liquor is output from the first resin column 21, then passes through the third valve 300, and then enters the decolorized mother liquor storage tank 3 for temporary storage.

[0040] When it is detected that the colority of the decolorized mother liquor output from the first resin column 21 is higher than a preset value, it indicates that the resin in the first resin column 21 has been deactivated, and the resin in the first resin column 21 needs to be regenerated. At this time, the first valve 100 and the third valve 300 are closed, the second valve 200 and the fourth valve 400 are opened, and the mother liquor storage tank 1, the second resin column 22, and the decolorized mother liquor storage tank 3 are connected to ensure that the decolorization process will not be interrupted due to the regeneration of the resin in the first resin column 21, thereby affecting the decolorization efficiency. At the same time, the seventh valve 700 and the fifth valve 500 are opened, and the solvent storage tank 5, the first resin column 21, and the backflushing liquid storage tank 4 are connected, and the remaining valves are kept in a closed state. At this time, the solvent (such as methanol) in the solvent storage tank 5 is pumped into the first resin column 21 to regenerate the resin in the first resin column 21 by backflushing. During the backflushing process at room temperature, the impurities attached to the resin may be difficult to be washed out by backflushing. At this time, a heated solvent or the first resin column 21 can be heated to increase the solubility of the impurities in the backflushing solvent. When it is detected that the colority of the backflushing liquid is reduced to a certain preset value, the seventh valve 700 and the fifth valve 500 are closed, and the backflushing is stopped.

[0041] Similarly, when the second resin column 22 needs to be regenerated, the first valve 100 and the third valve 300 can be opened to connect the mother liquor storage tank 1, the first resin column 21, and the decolorized mother liquor storage tank 3, and the fifth valve 500 and the seventh valve 700 are closed. The sixth valve 600 and the eighth valve 800 are opened to connect the solvent storage tank 5, the second resin column 22, and the backflushing liquid storage tank 4, and the remaining valves are kept in a closed state.

[0042] In the present application, the first resin column 21 and the second resin column 22 have the same structure, and the decolorization process in the second resin column 22 will not be described here.

[0043] In actual use, it should be noted that when the solvent is used to regenerate the resin column, the resin in the resin column is full of solvent, at this time, the decolorization cannot be directly carried out, the solvent remaining in the resin column for back flushing should be replaced before use, and the solvent used in the replacement process should be the same as that in the mother liquor. For example, in the present application, the solvent in the mother liquor is water, and the solvent used for back flushing regeneration is methanol. After the resin column is regenerated, deionized water can be used to replace the solvent in the resin column, and the resin column can be put into use after the replacement is completed. The waste liquid generated during the replacement process can be combined into the back flushing liquid storage tank 4 for centralized treatment.

[0044] The glufosinate ammonium mother liquor decolorization device provided by the present application decolorizes the glufosinate ammonium mother liquor by setting the resin adsorption device 2. The resin column in the resin adsorption device 2 is filled with resin. When decolorization is performed, it has the characteristics of large treatment capacity, easy regeneration, and high recycling rate. It overcomes the problems that the traditional method of using activated carbon to decolorize glufosinate ammonium mother liquor wastewater has a large amount of use, is not easy to regenerate after adsorption saturation, and results in a large amount of hazardous waste which is difficult to handle. In the present application, the first resin column 21 and the second resin column 22 included in the resin adsorption device 2 are respectively connected with the mother liquor storage tank 1, the decolorized mother liquor storage tank 3, the back flushing liquid storage tank 4, and the solvent storage tank 5 through a plurality of valves. The other resin column can continue to work when the first resin column 21 or the second resin column 22 is regenerated by back flushing, which effectively ensures the continuous performance of the decolorization process.

[0045] As shown in Figure 2 Optionally, the back flushing liquid storage tank 4 is connected with the solvent storage tank 5 through the purification device 6.

[0046] In the present application, the purification device 6 can be used to treat the back flushing liquid in the back flushing liquid storage tank 4, separate the solvent therefrom, and then recycle the solvent into the solvent storage tank 5 for reuse.

[0047] As shown in Figure 3 Optionally, the purification device 6 includes a distillation device 61, a condenser 62, a vacuum unit 63, and a tail gas treatment device 64 connected in sequence.

[0048] The condenser 62 is also connected with the solvent storage tank 5.

[0049] In use, the back flushing liquid stored in the back flushing liquid storage tank 4 is transferred into the distillation device 61 for distillation, and at the same time, the vacuum unit 63 performs vacuumization on the distillation device 61 through the condenser 62 to reduce the boiling point of the solvent. The solvent evaporated in the distillation device 61 is condensed into liquid in the condenser 62, and the condensed liquid is recycled into the solvent storage tank 5. The gas that cannot be condensed in the condenser 62 is discharged to the tail gas treatment device 64 through the vacuum unit 63 for harmless treatment. The still residue obtained in the distillation device 61 is concentrated to the waste liquid treatment section for treatment.

[0050] As Figure 4 shown, optionally, the input end of the first resin column 21 is provided with a first colorimetric detector 10, and the output end is provided with a second colorimetric detector 20;

[0051] The input end of the second resin column 22 is provided with a third colorimetric detector 30, and the output end is provided with a fourth colorimetric detector 40.

[0052] In the present application, the colorimetric detector described above can monitor the colorimetric value of the liquid passing through in real time, thereby facilitating the operator to regulate the decolorization process according to the detected colorimetric data.

[0053] As Figure 4 shown, optionally, the first valve 100, the second valve 200, the third valve 300, the fourth valve 400, the fifth valve 500, the sixth valve 600, the seventh valve 700, the eighth valve 800, the first colorimetric detector 10, the second colorimetric detector 20, the third colorimetric detector 30 and the fourth colorimetric detector 40 are electrically connected with the controller 7.

[0054] In the present application, the device described above is electrically connected with the controller 7, and the colorimetric detector can feed back the detected colorimetric data to the controller 7 in real time, and the controller 7 can regulate the valve through corresponding data.

[0055] For example, when the second colorimetric detector 20 arranged at the output end of the first resin column 21 detects that the colorimetric value of the decolorization mother liquor output is higher than the preset value during use, it indicates that the resin in the first resin column 21 has been deactivated, and the resin in the first resin column 21 needs to be regenerated, at this time, the first valve 100 and the third valve 300 are closed and the second valve 200 and the fourth valve 400 are opened through the controller 7, so that the mother liquor storage tank 1, the second resin column 22 and the decolorization mother liquor storage tank 3 are communicated, so as to ensure that the decolorization process will not be interrupted due to the regeneration of the resin in the first resin column 21, thereby affecting the decolorization efficiency. At the same time, the seventh valve 700 and the fifth valve 500 are opened, the solvent storage tank 5, the first resin column 21 and the backflushing liquid storage tank 4 are communicated, and the remaining valves remain closed, at this time, the solvent (such as methanol) in the solvent storage tank 5 is pumped into the first resin column 21 to backflush and regenerate the resin in the decolorization tube 214.

[0056] When the first colorimetric detector 10 arranged at the input end of the first resin column 21 detects that the colorimetric value of the backflushing liquid discharged decreases to a certain preset value, the first colorimetric detector 10 feeds back the related data to the controller 7, and the controller 7 controls the seventh valve 700 and the fifth valve 500 to be closed to stop backflushing.

[0057] As Figure 5 and Figure 6As shown, optionally, the first resin column 21 includes a cylinder 211 and end caps 212 for sealing the upper and lower ends of the cylinder 211. The two ends of the cylinder 211 are separated from the end caps 212 by partitions 213.

[0058] At least one decolorizing tube 214 is provided inside the cylinder 211. The decolorizing tube 214 passes through the partition 213 and connects the end caps 212 at the upper and lower ends.

[0059] The upper and lower ends of the decolorizing tube 214 are covered by a tube cap 2141 with through holes. The tube cap 2141 and the decolorizing tube 214 are detachably connected. The decolorizing tube 214 includes, from top to bottom, a first filter layer 2142, a resin layer 2143 and a second filter layer 2144.

[0060] A heat exchange medium outlet is provided on the upper part of the side of the cylinder 211, and a heat exchange medium inlet is provided on the lower part of the side.

[0061] In this application, the number of decolorizing tubes 214 is shown as one so that the accompanying drawings can be clearly shown.

[0062] During use, when decolorizing in the first resin column 21, the mother liquor input from the mother liquor storage tank 1 first enters the upper end cap 212, and then enters the decolorization tube 214 for decolorization. After passing through the tube cap 2141 at the top of the decolorization tube 214, the mother liquor is filtered through the first filter layer 2142. After secondary filtration, the mother liquor enters the resin layer 2143 (the resin layer 2143 is filled with resin balls with a particle size of 0.5-0.6 mm, and the resin balls are macroporous resin or ion exchange resin) for decolorization. The decolorized mother liquor flows into the lower end cap 212 and is output. After passing through the third valve 300, it is input into the decolorized mother liquor storage tank 3 for temporary storage.

[0063] In this application, the filter layer inside the decolorizing tube 214 is, for example, a filter cotton or filter screen, which not only filters the mother liquor but also prevents the resin filling the resin layer 2143 from leaking out.

[0064] The tube cap 2141 and the decolorizing tube 214 are detachably connected. This connection method facilitates cleaning, maintenance, and replacement of the filter layer and resin inside the decolorizing tube 214. This detachable connection can be achieved through threaded connection, snap-fit ​​connection, or plug-in connection. However, it should be noted that after the tube cap 2141 is connected to the decolorizing tube 214, it should ensure that the tube cap 2141 at the bottom of the decolorizing tube 214 does not fall off during normal use.

[0065] like Figure 5 As shown, optionally, a retaining layer 2121 is provided inside the upper end cap 212.

[0066] In use, the mother liquor enters the upper end of the first resin column 21, and is filtered by the filter medium (such as filter cotton) filled in the interception layer 2121, so as to intercept the mechanical impurities in the mother liquor, reduce the amount of solid impurities in the mother liquor entering the decoloring tube 214, and avoid the mechanical impurities in the mother liquor from blocking the decoloring tube 214. The filter medium in the interception layer 2121 also has the function of uniformly distributing the mother liquor.

[0067] A glufosinate-ammonium mother liquor decoloring device has the working process as follows:

[0068] In use, the first valve 100 and the third valve 300 are opened by the controller 7, and the remaining valves are kept in a closed state. The mother liquor is transferred from the mother liquor storage tank 1, passes through the first valve 100, and then enters the first resin column 21 for decoloring.

[0069] In the first resin column 21, the mother liquor enters the upper end of the first resin column 21, and is filtered by the filter medium (such as filter cotton) filled in the interception layer 2121, so as to intercept the mechanical impurities in the mother liquor, reduce the amount of solid impurities in the mother liquor entering the decoloring tube 214, and avoid the mechanical impurities in the mother liquor from blocking the decoloring tube 214. The filter medium in the interception layer 2121 also has the function of uniformly distributing the mother liquor.

[0070] The filtered mother liquor enters the decoloring tube 214 for decoloring. After the mother liquor passes through the tube cover 2141 at the top of the decoloring tube 214, it is subjected to secondary filtration by the first filter layer 2142 (the filtering precision of the first filter layer 2142 is higher than that of the interception layer 2121). The mother liquor after the secondary filtration enters the resin layer 2143 (the resin layer 2143 is filled with resin balls with a particle size of 0.5-0.6 mm, and the resin balls are macroporous resin or ion exchange resin) for decoloring. The decolored mother liquor flows into the lower end of the end cap 212, and is output and then input into the decoloring mother liquor storage tank 3 after passing through the third valve 300 for temporary storage.

[0071] When the second colority detector 20 set at the output end of the first resin column 21 detects that the colority of the outputted decolorized mother liquor is higher than the preset value, it indicates that the resin in the first resin column 21 has been deactivated, and the resin in the first resin column 21 needs to be regenerated. At this time, the controller 7 closes the first valve 100 and the third valve 300, opens the second valve 200 and the fourth valve 400, and connects the mother liquor storage tank 1, the second resin column 22 and the decolorized mother liquor storage tank 3, so as to ensure that the decolorization process will not be interrupted due to the regeneration of the resin in the first resin column 21, thereby affecting the decolorization efficiency. At the same time, the seventh valve 700 and the fifth valve 500 are opened to connect the solvent storage tank 5, the first resin column 21 and the backflushing liquid storage tank 4, and the remaining valves are kept closed. At this time, the solvent (such as methanol) in the solvent storage tank 5 is pumped into the first resin column 21 to backflush and regenerate the resin in the decolorization tube 214. In the room temperature backflushing process, the impurities attached to the resin may be difficult to be backflushed and washed out. At this time, the heat exchange medium is introduced into the shell side of the cylinder 211 to heat the decolorization tube 214 and improve the solubility of the impurities in the backflushing solvent. When the first colority detector 10 set at the input end of the first resin column 21 detects that the colority of the discharged backflushing liquid decreases to a certain preset value, the first colority detector 10 feeds back the related data to the controller 7, and the controller 7 controls the seventh valve 700 and the fifth valve 500 to be closed to stop backflushing.

[0072] The backflushing liquid stored in the backflushing liquid storage tank 4 is transferred into the distillation device 61 for distillation. At the same time, the vacuum unit 63 performs vacuumization on the distillation device 61 through the condenser 62 to reduce the boiling point of the solvent. The solvent evaporated in the distillation device 61 is heat-exchanged and condensed into liquid in the condenser 62, and the condensed liquid enters the solvent storage tank 5 for recovery. The gas that cannot be condensed in the condenser 62 is discharged to the tail gas treatment device 64 (such as a incinerator) through the vacuum unit 63 for harmless treatment. The still residue obtained in the distillation device 61 is concentrated to the waste liquid treatment section for treatment.

[0073] Similarly, when the second resin column 22 needs to be regenerated, the first valve 100 and the third valve 300 can be opened to connect the mother liquor storage tank 1, the first resin column 21 and the decolorized mother liquor storage tank 3, and the fifth valve 500 and the seventh valve 700 are closed. The sixth valve 600 and the eighth valve 800 are opened to connect the solvent storage tank 5, the second resin column 22 and the backflushing liquid storage tank 4, and the remaining valves are kept closed.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand; it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for decolorizing a glufosinate ammonium mother liquor, characterized by, The application relates to a decoloring device for decoloring mother liquor, which comprises a mother liquor storage tank (1), a decoloring mother liquor storage tank (3) and at least one set of resin adsorption devices (2). The resin adsorption devices (2) comprise first resin columns (21) and second resin columns (22), the mother liquor storage tank (1) is connected with material input ends of the first resin columns (21) and the second resin columns (22) through first valves (100) and second valves (200) respectively, and the decoloring mother liquor storage tank (3) is connected with material output ends of the first resin columns (21) and the second resin columns (22) through third valves (300) and fourth valves (400) respectively. The material input ends of the first resin columns (21) and the second resin columns (22) are connected in sequence through fifth valves (500) and sixth valves (600). The material output ends of the first resin columns (21) and the second resin columns (22) are connected in sequence through seventh valves (700) and eighth valves (800). The fifth valves (500) and the sixth valves (600) are connected with a backflushing liquid storage tank (4) through pipelines, and the seventh valves (700) and the eighth valves (800) are connected with a solvent storage tank (5) through pipelines.

2. The glufosinate ammonium mother liquor decolorizing device according to claim 1, characterized in that, The backflushing liquid storage tank (4) is connected with the solvent storage tank (5) through a purification device (6).

3. The glufosinate ammonium mother liquor decolorizing device according to claim 2, characterized in that, The purification device (6) comprises distillation devices (61), condensers (62), vacuum units (63) and tail gas treatment devices (64) connected in sequence. The condensers (62) are also connected with the solvent storage tank (5).

4. The device for decolorizing glufosinate ammonium mother liquor according to any one of claims 1 to 3, characterized in that, The input end of the first resin column (21) is provided with a first colority detector (10), and the output end is provided with a second colority detector (20). The input end of the second resin column (22) is provided with a third colority detector (30), and the output end is provided with a fourth colority detector (40).

5. The glufosinate ammonium mother liquor decolorizing device according to claim 4, characterized in that, The first valves (100), the second valves (200), the third valves (300), the fourth valves (400), the fifth valves (500), the sixth valves (600), the seventh valves (700), the eighth valves (800), the first colority detector (10), the second colority detector (20), the third colority detector (30) and the fourth colority detector (40) are electrically connected with a controller (7).

6. The device for decolorizing glufosinate ammonium mother liquor according to claim 1, characterized in that, The first resin column (21) comprises a cylinder body (211) and end covers (212) for closing upper and lower ends of the cylinder body (211), and the two ends of the cylinder body (211) are separated from the end covers (212) at the two ends through baffles (213). At least one decoloring pipe (214) is arranged in the cylinder body (211), and the decoloring pipe (214) communicates the end covers (212) at the upper and lower ends by penetrating the baffle (213). The upper and lower ends of the decoloring pipe (214) are covered by pipe covers (2141) with through holes, the pipe covers (2141) are detachably connected with the decoloring pipe (214), and the decoloring pipe (214) comprises a first filter layer (2142), a resin layer (2143) and a second filter layer (2144) from top to bottom in sequence. The upper part of the side of the barrel (211) is provided with a heat exchange medium outlet, and the lower part of the side is provided with a heat exchange medium outlet.

7. The glufosinate ammonium mother liquor decolorizing device according to claim 6, characterized in that, The upper end head (212) is provided with a trapped layer (2121).

Images