A sewage treatment device for polylactic acid fiber production

Abstract

The application discloses a sewage treatment device for polylactic acid fiber production and relates to the technical field of sewage treatment. The device comprises two parallel bases, and the two bases jointly support a driving motor, a storage bin and a treatment bin connected in sequence. The storage bin is provided with an inlet, and the end of the treatment bin is provided with a liquid outlet. A discharge outlet is arranged below. An adapter plate is sleeved in the treatment bin. A rotating shaft one is arranged at the center of the adapter plate. The rotating shaft one is connected with the output end of the driving motor. A rotating shaft two is rotatably arranged on the adapter plate. A plurality of communication holes are formed in the adapter plate. An agitation assembly is connected with the rotating shaft two. The agitation assembly rotates around the rotating shaft two. The agitation assembly rotates around the rotating shaft one with the adapter plate. A screen pipe assembly is sleeved with the rotating shaft one at one end and connected with a control assembly at the other end.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology, specifically to a wastewater treatment device for the production of polylactic acid fibers. Background Technology

[0002] The production process of polylactic acid (PLA) fiber mainly includes four major stages: raw material processing, polymerization, spinning, and post-processing. Using starch-containing agricultural products such as corn starch as raw materials, glucose is obtained through hydrolysis, and then the glucose is converted into lactic acid. The lactic acid undergoes a polymerization reaction to produce polylactic acid. The polymerized polylactic acid is then melt-spun or solution-spun to form polylactic acid fibers. Wastewater from the polylactic acid production process mainly originates from the raw material processing, polymerization, spinning, and post-processing steps. Wastewater typically contains organic pollutants generated from raw material decomposition, chemical reaction byproducts, and solvents used in the production process; salts, acids, alkalis, and heavy metal ions from raw materials, catalysts, and stabilizers; suspended solids from unreacted raw materials, product fragments, or other mechanical impurities; and nitrogen and phosphorus from raw materials or nutrients.

[0003] Existing methods for treating polylactic acid (PLA) production wastewater include physical methods (such as bar screens and grit chambers), chemical methods (such as alkaline spraying and neutralization), and biological methods (such as anaerobic digestion and biofilters) to remove suspended solids, organic matter, nitrogen, phosphorus, and other pollutants from the wastewater, or to recover organic matter, water, nitrogen, and phosphorus. However, existing methods only use sedimentation or interception to simply separate suspended solids or solid impurities, which results in poor separation efficiency and is not conducive to the subsequent recycling of various components.

[0004] Therefore, it is necessary to provide a wastewater treatment device for polylactic acid fiber production to solve the problems mentioned in the background art. Summary of the Invention

[0005] To achieve the above objectives, this application provides the following technical solution: a wastewater treatment device for polylactic acid fiber production, comprising:

[0006] The base is arranged in parallel as two, and the two bases together support a drive motor, a storage bin and a processing bin connected in sequence. The storage bin is provided with a feed inlet, the processing bin is provided with a drain outlet at the end, and the processing bin is provided with a discharge outlet at the bottom.

[0007] An adapter plate is fitted inside the processing chamber. A rotating shaft is located at the center of the adapter plate and is connected to the output end of the drive motor. A second rotating shaft is also rotatably mounted on the adapter plate. In addition, multiple connecting holes are provided on the adapter plate.

[0008] A stirring component is connected to the second rotating shaft, and the stirring component rotates around the second rotating shaft, while the stirring component rotates around the first rotating shaft along with the adapter plate;

[0009] The screen tube assembly has one end sleeved on the rotating shaft and the other end connected to the control assembly.

[0010] Furthermore, preferably, the agitation component includes:

[0011] The adapters are arranged symmetrically at intervals, with a through-hole pipe provided between the two adapters, and the through-hole pipe is arranged eccentrically.

[0012] The adapter sleeve is fixedly sleeved at the middle position of the through-hole tube, and a transfer ring is provided between the adapter sleeve and the adapter, and the transfer ring is also sleeved on the through-hole tube;

[0013] Spiral auger one is sleeved onto the through-hole pipe, and both ends of spiral auger one are respectively fixed on the adapter and the transfer ring;

[0014] Multiple support rods are arranged and fixedly installed between the transfer ring and the connecting sleeve rod. A spiral auger is installed on the outer sleeve of each support rod.

[0015] Furthermore, as a preferred embodiment, the spiral edges of the first and second spiral augers are ground, and ridge lines are cut at the spiral edge processing points.

[0016] Furthermore, as a preferred embodiment, the surface of the through-hole tube is provided with multiple through holes, and the adapter sleeve serves as a counterweight in the middle of the through-hole tube.

[0017] Furthermore, preferably, the control component includes:

[0018] The support plate frame is symmetrically arranged in two, and an integrated tube compartment is arranged between the two support plate frames. One end of the integrated tube compartment is connected to the main pipe, and the other end is connected to the drain pipe.

[0019] A connector is mounted on the support plate frame, and the connector extends into the integrated tube compartment via a connecting hose, connecting to the adjusting motor inside the integrated tube compartment.

[0020] Furthermore, preferably, the screen assembly includes:

[0021] The adapter pipe is arranged in multiple sections, and adjacent adapter pipes are connected by a screen cover to form a whole. The adapter pipe at the starting end is sleeved on the rotating shaft, and the adapter pipe at the ending end is connected to the main pipe.

[0022] A screw is disposed inside the adapter tube and the screen cover, and the end of the screw is connected to the output end of the regulating motor;

[0023] A flushing head is sleeved on the screw, and one end of the flushing head is connected to a piston head, which is sleeved and fitted on the screw.

[0024] Furthermore, preferably, the outer surface of the piston head is fitted to the inner wall of the transfer tube, and the length of the piston head is greater than the length of the screen cover.

[0025] Furthermore, as a preferred embodiment, the rinsing head has a pipe opening in the middle and a stepped groove is machined on the rinsing head. A guide groove is provided on the end face of the stepped groove, and a hole communicating with the pipe opening is provided on the outer wall of the rinsing head corresponding to the guide groove.

[0026] Furthermore, as a preferred embodiment, the piston head is hollow inside, connected to the pipe opening, and a through hole is provided at the other end of the piston head.

[0027] Compared with the prior art, this application provides a wastewater treatment device for polylactic acid fiber production, which has the following advantages:

[0028] In this application, wastewater generated during the production of polylactic acid fibers is added to the storage silo through the inlet, and the wastewater flows into the treatment chamber through the connecting hole. When the drive motor drives the rotating shaft to rotate, the adapter plate rotates synchronously in the treatment chamber. During this process, the stirring component rotates around the screen tube assembly while also rotating on its own axis, stirring the wastewater and breaking up suspended or solid matter. At the same time, the control component adjusts the screen tube assembly to filter the wastewater and clean itself, and the filtered water is discharged through the drain outlet for further treatment. In addition, the drive motor is stopped to allow sedimentation by monitoring the wastewater concentration in the treatment chamber, and the sediment is discharged through the discharge outlet. Attached Figure Description

[0029] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0030] Figure 1 A schematic diagram of the overall structure of a wastewater treatment device for polylactic acid fiber production;

[0031] Figure 2 This is a schematic diagram of the internal structure of the treatment chamber of a wastewater treatment device for polylactic acid fiber production.

[0032] Figure 3 A schematic diagram of the agitator component of a wastewater treatment device for polylactic acid fiber production;

[0033] Figure 4 A schematic diagram of the control component structure of a wastewater treatment device for polylactic acid fiber production;

[0034] Figure 5 A schematic diagram of the screen tube assembly structure of a wastewater treatment device for polylactic acid fiber production;

[0035] Figure 6 A schematic diagram of the piston head structure of a wastewater treatment device for polylactic acid fiber production;

[0036] In the diagram: 1. Base; 2. Drive motor; 3. Storage bin; 4. Processing bin; 41. Discharge port; 42. Liquid discharge port; 5. Feed inlet; 6. Agitator assembly; 61. Adapter; 62. Through-hole pipe; 63. Adapter sleeve; 64. Transfer ring; 65. Spiral auger one; 66. Support rod; 67. Spiral auger two; 7. Control assembly; 71. Support plate frame; 72. Integrated pipe compartment; 73. Main pipe; 74. Connector; 75. Liquid discharge pipe; 8. Screen pipe assembly; 81. Adapter pipe; 82. Screen cover; 83. Flushing head; 831. Pipe port; 832. Guide channel; 84. Piston head; 841. Through hole; 85. Screw; 9. Adapter plate; 91. Rotating shaft one; 92. Rotating shaft two; 93. Connecting hole. Detailed Implementation

[0037] Please see Figures 1-6 In this embodiment of the application, a wastewater treatment device for polylactic acid fiber production includes:

[0038] Two bases 1 are arranged in parallel, and the two bases 1 together support a drive motor 2, a storage bin 3 and a processing bin 4 connected in sequence. The storage bin 3 is provided with a feed inlet 5, the processing bin 4 is provided with a drain outlet 42 at the end, and a discharge outlet 41 is provided below the processing bin 4.

[0039] The adapter plate 9 is sleeved and installed inside the processing chamber 4. A rotating shaft 91 is provided at the center of the adapter plate 9. The rotating shaft 91 is connected to the output end of the drive motor 2. A rotating shaft 92 is also rotatably installed on the adapter plate 9. In addition, multiple connecting holes 93 are provided on the adapter plate 9.

[0040] The stirring component 6 is connected to the second rotating shaft 92, and the stirring component 6 rotates around the second rotating shaft 92. At the same time, the stirring component 6 follows the adapter plate 9 and rotates around the first rotating shaft 91.

[0041] The screen tube assembly 8 has one end sleeved on the rotating shaft 91 and the other end connected to the control assembly 7.

[0042] It should be explained that the wastewater generated from polylactic acid fiber production is added to the storage silo 3 through the feed inlet 5, and the wastewater flows into the treatment silo 4 through the connecting hole 93. The drive motor 2 drives the rotating shaft 91 to rotate, and the adapter plate 9 rotates synchronously in the treatment silo 4. During this period, the stirring component 6 rotates around the screen tube assembly 8 and rotates on its own, stirring the wastewater and breaking up suspended or solid matter. At the same time, the control component 7 adjusts the screen tube assembly 8 to filter the wastewater and clean itself, and the filtered water is discharged through the drain outlet 42 for further treatment. In addition, the drive motor 2 is stopped to allow sedimentation by monitoring the wastewater concentration in the treatment silo 4, and the sediment is discharged through the discharge outlet 41.

[0043] In this embodiment, as shown in the figure, the agitation component 6 includes:

[0044] Two adapters 61 are symmetrically arranged at intervals, and a through-hole pipe 62 is provided between the two adapters 61. The through-hole pipe 62 is eccentrically arranged.

[0045] The adapter sleeve 63 is fixedly sleeved at the middle position of the through hole tube 62, and a transfer ring 64 is provided between the adapter sleeve 63 and the adapter 61. The transfer ring 64 is also sleeved on the through hole tube 62.

[0046] Spiral auger 65 is sleeved on the through-hole pipe 62, and both ends of the spiral auger 65 are respectively fixed on the adapter 61 and the transfer ring 64;

[0047] Multiple support rods 66 are arranged and fixedly installed between the transfer ring 64 and the adapter sleeve 63. A spiral auger 67 is sleeved on the support rod 66.

[0048] It should be explained that the through-hole tube 62 is eccentrically arranged so that it can sweep and radiate to a wider range as the stirring component 6 rotates around the second rotating shaft 92 and the first rotating shaft 91.

[0049] In a preferred embodiment, the spiral edges of the first spiral auger 65 and the second spiral auger 67 are ground and ridges are cut at the spiral edge processing point. Specifically, the cutting is carried out simultaneously during the agitation of suspended solids, so that the sewage is mixed more evenly, avoiding the stratification of different components, which would result in poor filtration and separation of some components, and would not be conducive to subsequent targeted centralized treatment and recycling.

[0050] In a preferred embodiment, the through-hole pipe 62 has multiple through holes on its surface, and the adapter sleeve 63 serves as a counterweight in the middle of the through-hole pipe 62. Specifically, by adding the counterweight, the inertia of the overall rotation of the agitator 6 is increased. At the same time, the through holes on the through-hole pipe 62 allow sewage to enter the interior of the through-hole pipe 62, and the sewage is thrown out during the rotation of the agitator 6 to rinse the spiral auger 1 65 and spiral auger 2 67.

[0051] In this embodiment, the control component 7 includes:

[0052] The support plate frame 71 is symmetrically arranged in two, and an integrated tube compartment 72 is arranged between the two support plate frames 71. One end of the integrated tube compartment 72 is connected to the main pipe 73, and the other end is connected to the drain pipe 75.

[0053] A connector 74 is disposed on the support plate frame 71, and the connector 74 extends into the integrated tube compartment 72 through a connecting hose and is connected to the adjusting motor inside the integrated tube compartment 72.

[0054] In this embodiment, as shown in the figure, the screen tube assembly 8 includes:

[0055] The adapter pipe 81 is arranged in multiple segments, and two adjacent adapter pipes 81 are connected by a screen cover 82 to form a whole. The adapter pipe 81 at the starting end is sleeved on the rotating shaft 91, and the adapter pipe 81 at the ending end is connected to the main pipe 73. Specifically, the screen cover 82 effectively increases the filtration area and improves the filtration effect.

[0056] The screw 85 is disposed inside the adapter tube 81 and the screen cover 82, and the end of the screw 85 is connected to the output end of the regulating motor;

[0057] A flushing head 83 is sleeved on the screw 85, and one end of the flushing head 83 is connected to a piston head 84, which is sleeved on the screw 85.

[0058] It should be explained that the screw 85 rotates, causing the piston head 84 and the flushing head 83 to slide back and forth, thus cleaning the screen cover 82.

[0059] In a preferred embodiment, the outer surface of the piston head 84 is attached to the inner wall of the adapter tube 81, and the length of the piston head 84 is greater than the length of the screen cover 82.

[0060] In a preferred embodiment, the rinsing head 83 has a pipe opening 831 in the middle, and the rinsing head 83 is machined with a stepped groove. A guide groove 832 is provided on the end face of the stepped groove, and the guide groove 832 has a hole corresponding to the outer wall of the rinsing head 83 that communicates with the pipe opening 831.

[0061] In a preferred embodiment, the piston head 84 is hollow inside and connected to the port 831, and the other end of the piston head 84 is provided with a through hole 841.

[0062] It needs to be explained that the piston head 84 and the flushing head 83 slide back and forth, squeezing the wastewater filtered inside the screen tube assembly 8. Some of the wastewater is guided through the through hole 841, and some wastewater is guided through the guide groove 832. When the screen cover 82 is blocked, the piston head 84 slides and squeezes the filtered wastewater, which increases the water pressure inside part of the transfer pipe 81. At the same time, the filtered wastewater is guided through the guide groove 832 to flush the screen cover 82 and clean it simultaneously. The cleaning is completed without introducing external treatment liquid or disassembly, and the system operates continuously and efficiently.

[0063] In practice, wastewater generated from polylactic acid fiber production is added to storage silo 3 through inlet 5, and flows into treatment silo 4 through connecting hole 93. Drive motor 2 drives rotating shaft 91 to rotate, and adapter plate 9 rotates synchronously in treatment silo 4. During this process, stirring component 6 rotates around screen tube assembly 8 while rotating on its own axis, stirring the wastewater and breaking up suspended or solid matter. At the same time, regulating component 7 adjusts screen tube assembly 8 to filter wastewater and clean itself, and the filtered water is discharged through drain port 42 for further treatment. In addition, by monitoring the wastewater concentration in treatment silo 4, the drive motor 2 is adjusted to stop for sedimentation, and the sediment is discharged through discharge port 41.

[0064] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and application concept of this application, should be included within the scope of protection of this application.

Claims

1. A wastewater treatment device for polylactic acid fiber production, characterized in that: include: The base (1) is arranged in parallel as two, and the two bases (1) together support the drive motor (2), storage bin (3) and processing bin (4) connected in sequence. The storage bin (3) is provided with a feed inlet (5), the processing bin (4) is provided with a drain outlet (42) at the end, and the processing bin (4) is provided with a discharge outlet (41) below it. The adapter plate (9) is sleeved in the processing chamber (4). A rotating shaft (91) is provided at the center of the adapter plate (9). The rotating shaft (91) is connected to the output end of the drive motor (2). A rotating shaft (92) is also rotatably provided on the adapter plate (9). In addition, multiple connecting holes (93) are provided on the adapter plate (9). The stirring component (6) is connected to the second rotating shaft (92), and the stirring component (6) rotates around the second rotating shaft (92). At the same time, the stirring component (6) rotates around the first rotating shaft (91) along with the adapter plate (9). The screen tube assembly (8) has one end sleeved with the rotating shaft (91) and the other end connected to the control assembly (7); The agitation component (6) includes: Two adapters (61) are symmetrically arranged at intervals, and a through-hole pipe (62) is provided between the two adapters (61), and the through-hole pipe (62) is eccentrically arranged; The adapter sleeve (63) is fixedly sleeved at the middle position of the through hole tube (62), and a transfer ring (64) is provided between the adapter sleeve (63) and the adapter (61), and the transfer ring (64) is also sleeved on the through hole tube (62); Spiral auger (65) is sleeved on the through-hole pipe (62), and both ends of the spiral auger (65) are respectively fixed on the adapter (61) and the transfer ring (64); Multiple support rods (66) are arranged and fixedly installed between the transfer ring (64) and the adapter sleeve (63). A spiral auger (67) is installed on the outer sleeve of the support rod (66). The control component (7) includes: The support plate frame (71) is symmetrically arranged in two, and an integrated tube compartment (72) is arranged between the two support plate frames (71). One end of the integrated tube compartment (72) is connected to the main pipe (73), and the other end is connected to the drain pipe (75). A connector (74) is provided on the support plate frame (71), and the connector (74) extends into the integrated tube compartment (72) through a connecting hose and is connected to the adjusting motor inside the integrated tube compartment (72); The screen tube assembly (8) includes: The adapter pipe (81) is arranged in multiple segments, and two adjacent adapter pipes (81) are connected by a screen cover (82) to form a whole. The adapter pipe (81) at the starting end is sleeved on the rotating shaft (91), and the adapter pipe (81) at the ending end is connected to the main pipe (73). A screw (85) is disposed inside the adapter pipe (81) and the screen cover (82), and the end of the screw (85) is connected to the output end of the regulating motor; A flushing head (83) is sleeved on the screw (85), and one end of the flushing head (83) is connected to a piston head (84), which is sleeved on the screw (85).

2. The wastewater treatment device for polylactic acid fiber production according to claim 1, characterized in that: The spiral edges of the first spiral auger (65) and the second spiral auger (67) are ground, and the edges are cut at the processing points of the spiral edges.

3. The wastewater treatment device for polylactic acid fiber production according to claim 1, characterized in that: The through-hole tube (62) has multiple through holes on its surface, and the adapter sleeve (63) serves as a counterweight in the middle of the through-hole tube (62).

4. The wastewater treatment device for polylactic acid fiber production according to claim 1, characterized in that: The outer surface of the piston head (84) is attached to the inner wall of the transfer tube (81), and the length of the piston head (84) is greater than the length of the screen cover (82).

5. A wastewater treatment device for polylactic acid fiber production according to claim 1, characterized in that: The flushing head (83) has a pipe opening (831) in the middle and a stepped groove is machined on the flushing head (83). A guide groove (832) is provided on the end face of the stepped groove. The guide groove (832) has a hole corresponding to the outer wall of the flushing head (83) that connects to the pipe opening (831).

6. A wastewater treatment device for polylactic acid fiber production according to claim 5, characterized in that: The piston head (84) is hollow inside and connected to the port (831), and a through hole (841) is provided at the other end of the piston head (84).

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