Amantadine amination wastewater treatment system

Abstract

The utility model discloses an amantadine amination wastewater treatment system, which belongs to the field of wastewater treatment, and comprises a filter, a bipolar membrane electrodialyzer and a distiller, the two compartment structures are that first bipolar membranes and first anion exchange membranes are alternately arranged to form a first receiving chamber and a stock solution chamber, cation exchange layers of the first bipolar membranes face the first receiving chamber, a water outlet of the filter is communicated with a water inlet of the stock solution chamber, and a water outlet of the stock solution chamber is communicated with a water inlet of the distiller. According to the amantadine amination wastewater recycling device, the recycling treatment of the amantadine amination wastewater is realized, bromide ions and ammonia ions in the amantadine amination wastewater can be recycled, ammonia water and hydrogen bromide recycling liquid are obtained, the problem of adjusting the pH value of the wastewater is not needed, the consumption of water resources and time cost is reduced, the acid production efficiency is improved, and the economic benefit is increased.

Description

Technical Field

[0001] The utility model belongs to the field of wastewater treatment, and particularly relates to a wastewater treatment system for aminated amantadine wastewater. Background Technique

[0002] Amantadine is the earliest antiviral drug used to inhibit influenza virus and is also an antiviral drug. It is widely used clinically for the prevention and treatment of influenza A virus infectious diseases and is also a drug for treating neurological diseases such as Parkinson's disease and Parkinson's syndrome.

[0003] At present, most domestic enterprises use chemical synthesis method to produce amantadine, and aminated wastewater is often generated during the production process. The aminated amantadine wastewater has the characteristics of complex composition, high pollutant concentration, and large salt content; the aminated wastewater is alkaline, difficult to degrade, and the cage structure of amantadine contained in the wastewater greatly increases the difficulty of wastewater treatment.

[0004] Currently in China, dicyclopentadiene is mainly used as raw material to obtain amantadine through catalytic hydrogenation, isomerization, bromination, and amination. A large amount of wastewater is generated during the bromination and amination steps in the production process. In particular, the aminated wastewater generated during the amination process is difficult to treat, with great difficulty in biodegradation and serious environmental pollution.

[0005] A process for treating aminated amantadine wastewater by bipolar membrane electrodialysis process disclosed in CN103073132A includes the following steps: adjusting the pH of aminated amantadine wastewater with amantadine brominated wastewater to neutralize the aminated wastewater to about pH = 7 - 10; allowing the neutralized aminated wastewater to precipitate for more than 2 h; extracting the aminated wastewater with an amine extractant; introducing the aminated wastewater treated in the above steps into the salt chamber of a bipolar membrane electrodialysis device, introducing tap water into its acid chamber and alkali chamber, and introducing Na2SO4 solution into the electrode solutions at both ends; starting the bipolar membrane electrodialysis device to recover acid and alkali. The above patent proposes to recover and treat aminated wastewater by electrodialysis process, but there are problems in the process, that is, it is necessary to neutralize the wastewater, adjust the pH and perform multiple extractions, consuming a large amount of time cost and economic cost; in addition, due to the too large particle size of organic ammonium ions, it is not easy to pass through the cation selective permeable membrane, resulting in reduced production efficiency and poor economic benefits. Content of the Utility Model

[0006] The purpose of the utility model is to provide a wastewater treatment system for aminated amantadine wastewater to overcome at least one of the above defects in the prior art.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] The amantadine amination wastewater treatment system provided by the utility model includes a filter, a bipolar membrane electrodialyzer, and a distiller. The bipolar membrane electrodialyzer has a two-compartment structure. The two-compartment structure is composed of an alternating arrangement of a first bipolar membrane and a first anion exchange membrane to form a first receiving chamber and a stock solution chamber. The cation exchange layer of the first bipolar membrane faces the first receiving chamber. The water outlet of the filter is communicated with the water inlet of the stock solution chamber, and the water outlet of the stock solution chamber is communicated with the water inlet of the distiller.

[0009] Preferably, the bipolar membrane electrodialyzer further includes an anode plate and a cathode plate. The first bipolar membrane and the first anion exchange membrane are both arranged between the anode plate and the cathode plate. The anode plate and the cathode plate are respectively connected to the positive electrode and the negative electrode of a power supply.

[0010] Preferably, the bipolar membrane electrodialyzer further includes two bipolar membranes. The first bipolar membrane and the first anion exchange membrane are both arranged between the two bipolar membranes. The two bipolar membranes respectively form electrode chambers with the anode plate and the cathode plate.

[0011] Preferably, the bipolar membrane electrodialyzer further includes a second bipolar membrane and a second anion exchange membrane. A second anion exchange membrane is arranged on the inner side of the bipolar membrane close to the anode plate, and a second bipolar membrane is arranged on the inner side of the bipolar membrane close to the cathode plate. The second anion exchange membrane and the bipolar membrane close to the anode plate, and the second bipolar membrane and the bipolar membrane close to the cathode plate form a second receiving chamber. The cation exchange layer of the second bipolar membrane faces the bipolar membrane close to the cathode plate.

[0012] Preferably, one first bipolar membrane and one first anion exchange membrane form a membrane pair. The operating voltage of each membrane pair is 1 - 2.5V, and the current density is 50 - 500A / m 2 。

[0013] Preferably, the bipolar membrane electrodialyzer has a total of 1 - 200 membrane pairs.

[0014] Preferably, both the anode plate and the cathode plate are titanium ruthenium iridium electrodes, titanium electrodes, or platinum electrodes.

[0015] Preferably, the volume of the second receiving chamber is the same as that of the first receiving chamber, and the volume ratio of the first receiving chamber to the stock solution chamber is 1 - 2:1.

[0016] Preferably, the filter includes a filter screen assembly, an ultrafiltration assembly, and a suction filtration assembly arranged in sequence.

[0017] The beneficial effects of the utility model are as follows:

[0018] Realize the resource treatment of amantadine amination wastewater, recover bromide ions and ammonium ions in the amantadine amination wastewater, obtain ammonia water and hydrogen bromide recovery liquid, and the bromide ion recovery rate reaches more than 96%. This makes the difficult-to-treat organic wastewater able to reach the discharge standard after biochemical treatment, and can recover ammonia and bromine in it, enabling them to be recycled, greatly increasing the economic benefits and having good prospects. Adopt a two-compartment structure of a first bipolar membrane and a first anion exchange membrane arranged alternately to form a first receiving chamber and a stock solution chamber, eliminating the problem of adjusting the acidity and alkalinity of the wastewater, reducing the consumption of water resources and time costs, improving the acid production efficiency, and increasing the economic benefits. Brief Description of the Drawings

[0019] Figure 1 It is a system block diagram of the present utility model.

[0020] Figure 2 It is a structural schematic diagram of the bipolar membrane electrodialyzer of the present utility model.

[0021] The reference signs in the drawings are: 1 - distiller, 2 - bipolar membrane electrodialyzer, 3 - filter, 21 - first bipolar membrane, 22 - first anion exchange membrane, 23 - first receiving chamber, 24 - stock solution chamber, 25 - anode plate, 26 - cathode plate, 27 - bipolar membrane, 28 - electrode chamber, 29 - second bipolar membrane, 210 - second anion exchange membrane, 211 - second receiving chamber, 31 - filter screen assembly, 32 - ultrafiltration assembly, 33 - suction filtration assembly. Detailed Embodiments

[0022] Now, the present utility model will be further described in conjunction with the drawings and detailed embodiments.

[0023] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0024] Such as Figures 1 to 2As shown in the figure, the amantadine amination wastewater treatment system provided in this embodiment includes a filter 3, a bipolar membrane electrodialysis device 2, and a distiller 1. The bipolar membrane electrodialysis device 2 has a two-compartment structure. The two-compartment structure is composed of a first bipolar membrane 21 and a first anion exchange membrane 22 arranged alternately to form a first receiving chamber 23 and a stock solution chamber 24. A pair of membranes is composed of one first bipolar membrane 21 and one first anion exchange membrane 22. The bipolar membrane electrodialysis device 2 in this embodiment has a total of 10 membrane pairs. The bipolar membrane electrodialysis device 2 specifically further includes an anode plate 25, a cathode plate 26, two bipolar membranes 27, a second bipolar membrane 29, and a second anion exchange membrane 210. The cation exchange layer of the first bipolar membrane 21 faces the first receiving chamber 23. The water outlet of the filter 3 is communicated with the water inlet of the stock solution chamber 24, and the water outlet of the stock solution chamber 24 is communicated with the water inlet of the distiller 1. Both the first bipolar membrane 21 and the first anion exchange membrane 22 are arranged between the anode plate 25 and the cathode plate 26, and the anode plate 25 and the cathode plate 26 are respectively connected to the positive and negative electrodes of the power supply. Both the first bipolar membrane 21 and the first anion exchange membrane 22 are arranged between the two bipolar membranes 27, and the two bipolar membranes 27 and the anode plate 25 and the cathode plate 26 respectively form an electrode chamber 28. The second anion exchange membrane 210 is arranged on the inner side of the bipolar membrane 27 close to the anode plate 25, and the second bipolar membrane 29 is arranged on the inner side of the bipolar membrane 27 close to the cathode plate 26. The anode plate 25 and the cathode plate 26 in this embodiment are both titanium-coated ruthenium-iridium electrodes. The anode plate 25 is located on the left side, and the cathode plate 26 is located on the right side. The second anion exchange membrane 210 and the bipolar membrane 27 close to the anode plate 25, and the second bipolar membrane 29 and the bipolar membrane 27 close to the cathode plate 26 form a second receiving chamber 211. The cation exchange layer of the second bipolar membrane 29 faces the bipolar membrane 27 close to the cathode plate 26. The first anion exchange membrane 22, the second anion exchange membrane 210, the first bipolar membrane 21, the second bipolar membrane 29, and the bipolar membrane 27 have the same size, and all have the following size: width is 200 mm, length is 400 mm, and thickness is 1 mm. The volume of the second receiving chamber 211 is the same as that of the first receiving chamber 23, and the volume ratio of the first receiving chamber 23 to the stock solution chamber 24 is 1:1. The filter 3 includes a filter screen assembly 31, an ultrafiltration assembly 32, and a suction filtration assembly 33 arranged in sequence.

[0025] The amantadine amination wastewater treatment method includes the following steps:

[0026] S1: Filter the amantadine amination wastewater through the filter 3. Specifically: filter the insoluble impurities through the filter screen assembly 31, and then obtain a brownish-red clear filtrate after being processed by the ultrafiltration assembly 32 and the suction filtration assembly 33;

[0027] S2: Pass the filtrate into the stock solution chamber 24 for treatment: Take 2 L of the filtrate processed in step S1 and add it to the stock solution chamber 24. Add 2 L of pure water to both the first receiving chamber 23 and the second receiving chamber 211, and add a 3% sulfuric acid solution to the electrode chamber 28.

[0028] S3: Keep the water pressures in the stock solution chamber 24, the first receiving chamber 23 and the second receiving chamber 211 consistent, turn on the power supply, set the voltage limit to 27 V and the current limit to 21 A. The flow rates of the stock solution chamber 24, the first receiving chamber 23, the second receiving chamber 211, and the electrode chamber 28 are independently 100 - 400 L / h.

[0029] S4: After running for 13 min, the conductivities of the first receiving chamber 23 and the second receiving chamber 211 no longer increase. The first receiving chamber 23 and the second receiving chamber 211 produce hydrobromic acid recovery solution, and the stock solution chamber 24 obtains a mixed solution containing ammonia water.

[0030] S5: Feed the mixed solution containing ammonia water obtained in step S4 into the distiller 1 for treatment to obtain ammonia water.

[0031] During the above operation, the solution temperature is controlled at 15 - 35 °C.

[0032] According to the experimental data and the detection data, the voltage of each membrane pair in this example can be calculated to be 2 V, and the current density is 230 - 400 A / m 2 , the acid production concentration is 0.5 mol / L, the bromide ion concentration in the stock solution chamber 24 is less than 0.02 mol / L, the bromine recovery rate > 96%, the energy consumption for raw water treatment is 36.5 kwh / t, and the raw water treatment capacity is 16.5 L / m 2 / h.

[0033] Regarding the ion migration path during the operation as follows:

[0034] Br - ions in the stock solution chamber 24 migrate to the anode plate 25 through the first anion exchange membrane, enter the first receiving chamber 23, and combine with H + ions generated by the cation exchange layer of the first bipolar membrane 21 to form hydrobromic acid; meanwhile, OH - generated by the anion exchange layer of the first bipolar membrane 21 is captured by NH4 + in the stock solution chamber 24 to form NH3·H2O in the stock solution chamber 24. Br - ions in the stock solution chamber 24 migrate to the anode plate 25 through the second anion exchange membrane, enter the second receiving chamber 211, and combine with H + ions generated by the electrode solution to form hydrobromic acid; meanwhile, OH - generated by the anion exchange layer of the second bipolar membrane 29 is captured by NH4 + in the stock solution chamber 24 to form NH3·H2O in the stock solution chamber 24, and H + generated by the cation exchange layer of the second bipolar membrane 29 enters the second receiving chamber 211 and finally enters the electrode chamber 28 on the right to collect high-concentration acid.

[0035] The utility model realizes the resource treatment of amantadine amination wastewater, can recover bromide ions and ammonium ions in the amantadine amination wastewater, obtain ammonia water and hydrogen bromide recovery liquid, and the recovery rate of bromide ions reaches more than 96%. The difficult-to-treat organic wastewater can reach the discharge standard after biochemical treatment, and ammonia and bromine can be recovered and recycled, greatly increasing the economic benefits and having a good prospect. The two-compartment structure of the first receiving chamber 23 and the stock solution chamber 24 is formed by alternately arranging the first bipolar membrane 21 and the first anion exchange membrane 22, which solves the problem of adjusting the acidity and alkalinity of the wastewater, reduces the consumption of water resources and time costs, improves the acid production efficiency, and increases the economic benefits.

[0036] 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 foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Amantadine amination wastewater treatment system, characterized by: including filters, bipolar membrane electrodialyzers, and distiller; The bipolar membrane electrodialyzer is a two-compartment structure, wherein the first bipolar membrane and the first anion exchange membrane are alternately arranged to form a first receiving chamber and a raw liquid chamber; The cation exchange layer of the first bipolar membrane faces the first receiving chamber; The water outlet of the filter is communicated with the water inlet of the stock liquid chamber; The water outlet of the raw liquid chamber is communicated with the water inlet of the distiller.

2. The amantadine amination wastewater treatment system according to claim 1, characterized in that: The bipolar membrane electrodialyzer also includes an anode plate and a cathode plate; The first bipolar membrane and the first anion exchange membrane are both disposed between the anode plate and the cathode plate; The anode plate and the cathode plate are connected to the positive electrode and the negative electrode of the power source respectively.

3. The amantadine amination wastewater treatment system according to claim 2, characterized in that: The bipolar membrane electrodialyzer also includes two polar membranes; The first bipolar membrane and the first anion exchange membrane are both disposed between the two bipolar membranes; The two polar membranes respectively form electrode chambers with the anode plate and the cathode plate.

4. The amantadine amination wastewater treatment system according to claim 3, characterized in that: The bipolar membrane electrodialyzer also includes a second bipolar membrane and a second anion exchange membrane; The second anion exchange membrane is arranged on the inner side of the polar membrane close to the anode plate; The second bipolar membrane is arranged on the inner side of the polar membrane close to the cathode plate; The second anion exchange membrane and the polar membrane close to the anode plate, and the second bipolar membrane and the polar membrane close to the cathode plate form a second receiving chamber; The cation exchange layer of the second bipolar membrane is arranged toward the bipolar membrane close to the cathode plate.

5. The amantadine amination wastewater treatment system according to claim 1, characterized in that: The first bipolar membrane and the first anion exchange membrane constitute a membrane pair; The operating voltage of each membrane pair is 1-2.5V and the current density is 50-500A / m 2 .

6. The amantadine amination wastewater treatment system according to claim 2, characterized in that: The bipolar membrane electrodialyzer has 1 to 200 membrane pairs in total.

7. The amantadine amination wastewater treatment system according to claim 2, characterized in that: The anode plate and the cathode plate are both titanium-coated ruthenium-iridium electrodes, titanium electrodes or platinum electrodes.

8. The amantadine amination wastewater treatment system according to claim 4, characterized in that: The second receiving chamber has the same volume as the first receiving chamber; The volume ratio of the first receiving chamber to the original liquid chamber is 1-2:

1.

9. The amantadine amination wastewater treatment system according to claim 1, characterized in that: The filter comprises a filter screen component, an ultrafiltration component and a suction filtration component which are arranged in sequence.

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