Wastewater treatment device in sodium lauroyl sarcosinate synthesis process

Abstract

The utility model discloses a wastewater treatment device in a sodium lauroyl sarcosinate synthesis process, which comprises a desalting unit, a biochemical treatment unit and a membrane treatment unit, and the desalting unit comprises an evaporator and a condenser which are connected with each other; the biochemical treatment unit comprises a flocculation tank and an aeration tank which are communicated with each other, the flocculation tank is connected with the condenser, an isolation box is arranged in the flocculation tank, filtering holes are formed in the isolation box, a dosing box is arranged in the isolation box, a discharging pipe and a driving motor are arranged on the dosing box, and a rotating rod penetrating through the isolation box to the bottom of the flocculation tank is arranged on the driving motor; the rotating rod is provided with a first stirring blade located in the isolation box and a second stirring blade located outside the isolation box. A pull rod is arranged in the aeration tank, a plurality of biological filler cages distributed up and down are arranged on the pull rod, and an aeration pipe fitting connected with an aeration pump is arranged on the periphery of the pull rod. The device has the characteristic of improving the efficiency and the effect of biological treatment of wastewater.

Description

Technical Field

[0001] This utility model relates to a treatment device in the synthesis process of sodium lauroyl sarcosinate, and more particularly to a wastewater treatment device in the synthesis process of sodium lauroyl sarcosinate. Background Technology

[0002] Sodium lauroyl sarcosinate is a mild anionic surfactant with low toxicity, low irritation, good biodegradability, good compatibility, and antibacterial properties. It is widely used in many fields such as daily chemicals, food, metal processing, and biomedicine.

[0003] Currently, the synthesis process of sodium lauroyl sarcosinate generally adopts the Shorton-Baumann condensation reaction. This step includes acylation reaction, condensation reaction, acidification purification and neutralization to form salt. Lauroyl chloride is synthesized by acylation reaction of thionyl chloride and lauryl acid. Lauroyl chloride and sodium sarcosinate are condensed under alkaline conditions to obtain crude sodium lauroyl sarcosinate. Then, the water-insoluble lauroyl sarcosinate is separated by inorganic acid acidification, and then neutralized with alkali to obtain sodium lauroyl sarcosinate.

[0004] In the above synthesis process, wastewater is generated in steps such as acyl chloride preparation, condensation reaction, acidification, and neutralization. For example, acyl chloride preparation produces wastewater containing unreacted lauric acid, thionyl chloride, and acidic byproducts; condensation reaction produces wastewater containing unreacted sodium sarcosinate, sodium hydroxide, and sodium chloride; and acidification and neutralization reactions produce wastewater containing free fatty acids and residual surfactants. Therefore, the wastewater from the synthesis process of sodium lauroyl sarcosinate is characterized by complex composition, high organic matter concentration, and high salt content.

[0005] Currently, wastewater from the sodium lauroyl sarcosinate synthesis process is treated using methods such as neutralization and adjustment, biological treatment, and membrane separation. However, during biological treatment, the high salt concentration in the wastewater often exceeds the tolerance threshold of microorganisms, thus affecting the treatment effect. Furthermore, due to the presence of long-chain fatty acids, acyl chloride hydrolysis products, and other recalcitrant organic matter in the wastewater, biological treatment alone is inefficient and slow. Utility Model Content

[0006] The purpose of this invention is to provide a wastewater treatment device for the synthesis process of sodium lauroyl sarcosinate. This invention features improved efficiency and effectiveness in biological wastewater treatment.

[0007] The technical solution of this utility model: a wastewater treatment device in the synthesis process of sodium lauroyl sarcosinate, including a desalination unit, a biochemical treatment unit, and a membrane treatment unit. The desalination unit includes an evaporator and a condenser, with the evaporator connected to the condenser via a pipeline. The biochemical treatment unit includes a flocculation tank and an aeration tank that are interconnected. The flocculation tank is connected to the condenser. An isolation box is provided inside the flocculation tank, and a filter hole is provided on the isolation box. A dosing tank is provided inside the isolation box, and a discharge pipe and a drive motor are provided on the dosing tank. The drive motor has a rotating rod that passes through the isolation box to the bottom of the flocculation tank. The rotating rod has a first stirring blade located inside the isolation box and a second stirring blade located outside the isolation box. A tie rod is provided inside the aeration tank, and several vertically distributed biological packing cages are provided on the tie rod. An aeration pipe connected to an aeration pump is provided around the tie rod.

[0008] In the aforementioned wastewater treatment device for the synthesis process of sodium lauroyl sarcosinate, the bottom of the rotating rod is provided with an umbrella-shaped filter screen, the rotating rod is connected to the center of the top of the filter screen, the bottom edge of the filter screen is provided with a recessed collection groove, and the filter screen is provided with an adsorbent.

[0009] In the aforementioned wastewater treatment device for the sodium lauroyl sarcosinate synthesis process, the biological packing cage includes a disc-shaped upper support and a lower support. The diameter of the lower support is larger than that of the upper support. Several connecting rods are evenly arranged between the edges of the upper and lower supports. One end of the connecting rod is hinged to the upper support, and the other end of the connecting rod is hinged to the lower support. The tie rod includes a main tie rod and several auxiliary tie rods. The main tie rod is connected to the upper support of the uppermost biological packing cage, and the auxiliary tie rods are respectively connected to the lower support of the upper biological packing cage and the upper support of the lower biological packing cage.

[0010] In the aforementioned wastewater treatment device for the sodium lauroyl sarcosinate synthesis process, the aeration pipe includes a bottom annular pipe, a plurality of longitudinal pipes on the annular pipe, and a plurality of aeration nozzles on the top of the annular pipe and the sides of the longitudinal pipes.

[0011] In the aforementioned wastewater treatment device for the sodium lauroyl sarcosinate synthesis process, the deep treatment unit includes a deep treatment tank, which contains several membrane modules with wedge-shaped bottoms. The deep treatment tank also contains several bases with insertion holes for installing the membrane modules.

[0012] In the aforementioned wastewater treatment device for the sodium lauroyl sarcosinate synthesis process, the membrane module includes a reverse osmosis membrane module, a hollow fiber filter membrane module, or a ceramic membrane module.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] The evaporator and condenser in this invention work together to distill and condense the salt in the wastewater, effectively separating high-concentration salts and preventing them from affecting the survival environment of microorganisms in the subsequent biological treatment unit, thus reducing the treatment effect of the microorganisms on the wastewater. After desalination and condensation, the wastewater enters the flocculation tank. By adding coagulant to the dosing tank, long-chain fatty acids, acyl chloride hydrolysis products, and other organic colloidal substances in the wastewater flocculate and settle, reducing the pressure on subsequent biological treatment. The coagulant is discharged from the outlet pipe of the dosing tank and is first stirred by the first stirring blade in the isolation tank, and then stirred by the second stirring blade in the flocculation tank, so that the coagulant is quickly dispersed into the water and fully contacts the wastewater, improving the sufficiency and efficiency of flocculation treatment. After flocculation and sedimentation, the wastewater is transported to the aeration tank for targeted microbial treatment of different water layers, more effectively adsorbing and decomposing organic pollutants in the wastewater. Combined with aeration and oxygen supply, the treatment efficiency and effect are improved.

[0015] Therefore, this invention has the characteristic of improving the efficiency and effectiveness of biological wastewater treatment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] The labels in the attached diagram are as follows: 11. Evaporator; 12. Condenser; 2. Flocculation tank; 21. Isolation box; 22. Filter hole; 23. Dosing tank; 24. Discharge pipe; 25. Drive motor; 26. Rotating rod; 27. First stirring blade; 28. Second stirring blade; 29. ​​Filter screen; 291. Collection tank; 3. Aeration tank; 31. Tie rod; 311. Main tie rod; 312. Secondary tie rod; 32. Biological packing cage; 321. Upper support; 322. Lower support; 323. Connecting rod; 33. Aeration fittings; 331. Annular pipe; 332. Longitudinal pipe; 333. Aeration nozzle; 34. Aeration pump; 4. Deep treatment tank; 41. Membrane module; 42. Base; 43. Insertion hole. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0019] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, a hinged connection, a rotating connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] Example:

[0021] like Figure 1 As shown, the wastewater treatment device in the sodium lauroyl sarcosinate synthesis process includes a desalination unit, a biochemical treatment unit, and a membrane treatment unit. The desalination unit includes an evaporator 11 and a condenser 12, with the evaporator 11 connected to the condenser 12 via a pipe. The biochemical treatment unit includes a flocculation tank 2 and an aeration tank 3 that are interconnected. The flocculation tank 2 is connected to the condenser 12. An isolation box 21 is provided inside the flocculation tank 2. The isolation box 21 has filter holes 22 and a dosing tank 23. The dosing tank 23 has a discharge pipe 24 and a drive motor 25. The drive motor 25 has a rotating rod 26 that passes through the isolation box 21 to the bottom of the flocculation tank 2. The rotating rod 26 has a first stirring blade 27 located inside the isolation box 21 and a second stirring blade 28 located outside the isolation box 21. The aeration tank 3 has a tie rod 31 with several vertically distributed biological packing cages 32. An aeration pipe 33 connected to an aeration pump 34 is provided around the tie rod 31.

[0022] The evaporator 11 and condenser 12 work together to distill and condense the salt in the wastewater, effectively separating the high-concentration salt from the wastewater. This avoids affecting the survival environment of the microorganisms in the subsequent biological treatment unit, thus reducing the treatment effect of the microorganisms on the wastewater. The desalinated and condensed wastewater enters the flocculation tank 2. By adding coagulant to the dosing tank 23, the coagulant combines with the wastewater, causing the long-chain fatty acids, acyl chloride hydrolysis products, and other organic colloidal substances in the wastewater to flocculate and settle, separating them from the wastewater and reducing the pressure on subsequent biological treatment. The coagulant is discharged from the discharge pipe 24 of the dosing tank 23 and is first stirred by the first stirring blade 2 in the isolation tank 21. The stirring action of the 7 ensures that the various components in the coagulant are mixed evenly and the particulate matter is reduced. Then, in the flocculation tank 2, the second stirring blade 28 stirs the coagulant, causing it to quickly disperse into the water and fully contact the wastewater, improving the sufficiency and efficiency of flocculation treatment and reducing the waste of coagulant. After flocculation and sedimentation, the wastewater is transported to the aeration tank 3. Multiple biological packing cages 32 of different heights are set in the aeration tank 3. Different microorganisms can be used on the biological packing cages 32 to treat different water layers of the wastewater in a targeted manner, more effectively adsorbing and decomposing organic pollutants in the wastewater. Combined with aeration and oxygen supply, the treatment efficiency and effect are improved.

[0023] The bottom of the rotating rod 26 is provided with an umbrella-shaped filter screen 29. The rotating rod 26 is fixedly connected to the top center of the filter screen 29. The bottom edge of the filter screen 29 is provided with a recessed collection groove 291. Adsorbent is provided on the filter screen 29. The rotating rod 26 rotates and stirs, causing the filter screen 29 to rotate. This allows the flocculent to be guided by the filter screen 29 and subjected to centrifugal force, falling along the filter screen 29 into the surrounding collection groove 291 for easy collection and treatment. This also allows the adsorbent on the filter screen 29, such as activated carbon, graphene oxide, diatomaceous earth, etc., to fully contact the wastewater and adsorb and remove organic pollutants in the wastewater.

[0024] The biological packing cage 32 includes a disc-shaped upper support 321 and a lower support 322. The diameter of the lower support 322 is larger than the diameter of the upper support 321. A plurality of connecting rods 323 are evenly arranged between the edges of the upper support 321 and the lower support 322. One end of the connecting rod 323 is hinged to the upper support 321, and the other end of the connecting rod 323 is hinged to the lower support 322. The pull rod 31 includes a main pull rod 311 and a plurality of auxiliary pull rods 312. The main pull rod 311 is detachably connected to the upper support 321 of the uppermost biological packing cage 32. The auxiliary pull rods 312 are detachably connected to the lower support 322 of the upper biological packing cage 32 and the upper support 321 of the lower biological packing cage 32, respectively. When in use, the main tie rod connects to the topmost biological packing cage 32, and the other adjacent biological packing cages 32 are connected by the auxiliary tie rod 312. When the biological packing cage 32 is immersed in wastewater, under the action of gravity, the upper support 321 and the lower support 322 in the biological packing cage 32 separate from each other and are connected by the connecting rod 323, so that the entire biological packing cage 32 unfolds, resulting in a large biological utilization area. When not in use, the biological packing cage 32 can be detached from the tie rod 31, and the upper support 321 and the lower support 322 can be overlapped to compress the biological packing cage 32, thereby reducing the space occupied by the biological packing cage 32 and making it easier to carry and transport.

[0025] The aeration pipe 33 includes a bottom annular pipe 331, with several longitudinal pipes 332 arranged along the circumference of the annular pipe 331, and several aeration nozzles 333 arranged at the top of the annular pipe 331 and on the sides of the longitudinal pipes 332. The aeration pipe 33 surrounds the biological packing cage 32 through the annular pipe 331 and the longitudinal pipes 332, providing oxygen to the microorganisms on the biological packing cage 32 more evenly and fully.

[0026] The advanced treatment unit includes an advanced treatment tank 4, within which are several membrane modules 41 with wedge-shaped bottoms. The advanced treatment tank 4 also contains several bases 42, each with insertion holes 43 for mounting the membrane modules 41. These insertion holes 43 mate with the wedge-shaped bottoms of the membrane modules 41. Multiple membrane modules 41 are installed within the advanced treatment tank 4 to further treat the wastewater and improve the water purification effect. The membrane modules 41 are installed in the insertion holes 43 of the bases 42 using a wedge-shaped structure, allowing for quick, convenient, and accurate installation with a stable structure. Furthermore, different membrane modules 41 can be combined and installed according to water quality conditions.

[0027] The membrane module 41 includes a reverse osmosis membrane module, a hollow fiber filter membrane module, or a ceramic membrane module.

[0028] The parts of this utility model not described in detail are existing technologies and therefore will not be specifically described here.

Claims

1. A device for the treatment of waste water in the process of synthesis of sodium lauroyl amino acid, characterized by: The system includes a desalination unit, a biochemical treatment unit, and a membrane treatment unit. The desalination unit includes an evaporator (11) and a condenser (12) connected to each other. The biochemical treatment unit includes a flocculation tank (2) and an aeration tank (3). The flocculation tank (2) is connected to the condenser (12). An isolation box (21) is provided inside the flocculation tank (2). A filter hole (22) is provided on the isolation box (21). A dosing tank (23) is provided inside the isolation box (21). A discharge pipe (24) and a drive motor (25) are provided on the dosing tank (23). The motor (25) is equipped with a rotating rod (26) that passes through the isolation box (21) to the bottom of the flocculation tank (2). The rotating rod (26) is equipped with a first stirring blade (27) located inside the isolation box (21) and a second stirring blade (28) located outside the isolation box (21). The aeration tank (3) is equipped with a tie rod (31). The tie rod (31) is equipped with several vertically distributed biological packing cages (32). The tie rod (31) is equipped with an aeration pipe (33) connected to the aeration pump (34) on its periphery.

2. The device for treating waste water in the process of synthesizing sodium lauroyl glutamate according to claim 1, characterized in that: The bottom of the rotating rod (26) is provided with an umbrella-shaped filter screen (29). The rotating rod (26) is connected to the top center of the filter screen (29). The bottom edge of the filter screen (29) is provided with a recessed collection groove (291). The filter screen (29) is provided with an adsorbent.

3. The device for treating waste water in the process of synthesizing sodium lauroyl glutamate according to claim 1, characterized in that: The biological packing cage (32) includes a disc-shaped upper support (321) and a lower support (322). The diameter of the lower support (322) is larger than that of the upper support (321). Several connecting rods (323) are evenly arranged between the edges of the upper support (321) and the lower support (322). One end of the connecting rod (323) is hinged to the upper support (321), and the other end of the connecting rod (323) is hinged to the lower support (322). The pull rod (31) includes a main pull rod (311) and several auxiliary pull rods (312). The main pull rod (311) is connected to the upper support (321) of the uppermost biological packing cage (32), and the auxiliary pull rods (312) are connected to the lower support (322) of the upper biological packing cage (32) and the upper support (321) of the lower biological packing cage (32), respectively.

4. The lauroyl sarcosine sodium synthetic process wastewater treatment device according to claim 1, characterized by: The aeration pipe (33) includes an annular pipe (331) at the bottom, a plurality of longitudinal pipes (332) on the annular pipe (331), and a plurality of aeration nozzles (333) on the top of the annular pipe (331) and the sides of the longitudinal pipes (332).

5. The lauroyl sarcosine sodium synthetic process wastewater treatment device according to claim 1, characterized by: The membrane treatment unit includes a deep treatment tank (4), which contains several membrane modules (41) with wedge-shaped bottoms. The deep treatment tank (4) also contains several bases (42), and the bases (42) have insertion holes (43) for installing the membrane modules (41).

6. The lauroyl sarcosine sodium synthetic process wastewater treatment device according to claim 5, characterized by: The membrane module (41) includes a reverse osmosis membrane module, a hollow fiber filter membrane module, or a ceramic membrane module.

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