Wastewater transport system for a lyocell fiber production line and lyocell fiber production line

Abstract

The application discloses a wastewater conveying system of a lyocell fiber production line and the lyocell fiber production line, and improves the operation efficiency of the wastewater conveying system by improving the structure of the wastewater conveying system of the lyocell fiber production line. The wastewater conveying system of the lyocell fiber production line comprises a centrifugal pump and a first pipe part connected with an inlet of the centrifugal pump and a first storage part used for storing wastewater. The first pipe part is further provided with a second storage part which can be connected with or disconnected from a starting water source.

Description

Technical Field

[0001] This application relates to the field of lyocell fiber production technology, specifically to a wastewater conveying system for a lyocell fiber production line and a lyocell fiber production line. Background Technology

[0002] Lyocell fiber, as a new type of green and environmentally friendly fiber, is being used more and more widely. However, the production process of lyocell fiber generates a large amount of wastewater. To treat this wastewater, a wastewater transport system is needed to transport it to a treatment facility. In this process, the operating efficiency of the wastewater transport system is one of the factors affecting the manufacturing cost of a lyocell fiber production line. Utility Model Content

[0003] The purpose of this invention is to provide a wastewater conveying system for a lyocell fiber production line and a lyocell fiber production line. By improving the structure of the wastewater conveying system for the lyocell fiber production line, the operating efficiency of the wastewater conveying system is improved.

[0004] To achieve the above objectives, this utility model provides a wastewater conveying system for a lyocell fiber production line, including a centrifugal pump and a first pipe connecting the inlet of the centrifugal pump to a first storage section, the first storage section being used to store wastewater; the first pipe section is also provided with a second storage section, the second storage section being able to be connected to or disconnected from a start-up water source.

[0005] By adopting the technical solution of this application, a centrifugal pump is used instead of a traditional self-priming pump. A second storage section, which can be connected to or disconnected from the start-up water source, is also provided. During the start-up phase, water can be quickly injected into the second storage section, reducing start-up time and energy consumption. Furthermore, the centrifugal pump itself is more efficient than a self-priming pump. Since the centrifugal pump has no self-priming structure, it has low fluid flow resistance, and its efficiency can be increased to 70% to 90% or even higher. Therefore, the operating efficiency of the wastewater treatment system in the lyocell fiber production line can be increased, and the manufacturing cost of the lyocell fiber production line can be reduced.

[0006] Optionally, it also includes a first one-way valve, which is located upstream of the second storage unit in the direction of liquid flow.

[0007] Optionally, the second storage section is a box structure; or, the second storage section includes a tube with at least one bend.

[0008] Optionally, the second storage unit further includes an inlet connected to the outlet of the first storage unit and a drain connected to the inlet of the centrifugal pump; the height of the inlet from the ground is greater than the height of the drain from the ground.

[0009] Optionally, the second storage section is provided with a water inlet for communicating with the outlet of the start-up water source; the water inlet is located on the top surface of the second storage section in the height direction of the second storage section; or, the water inlet is located on the side of the second storage section.

[0010] Optionally, the second storage unit is provided with a negative pressure detection device, which is used to detect the vacuum level of the second storage unit.

[0011] Optionally, a filter device is provided between the second storage section and the first one-way valve section.

[0012] Optionally, a first valve is provided between the drain port of the second storage unit and the inlet of the centrifugal pump.

[0013] Optionally, the outlet of the centrifugal pump is further provided with a second pipe section, which is used to connect to the inlet of the downstream device of the wastewater conveying system; the second pipe section is provided with a second check valve section.

[0014] Optionally, the second pipe section is further provided with a second valve, which is located downstream of the second check valve section in the direction of liquid flow.

[0015] This application also provides a lyocell fiber production line, including the aforementioned wastewater conveying system.

[0016] By adopting the wastewater conveying system in this embodiment, the operating costs of the lyocell fiber production line can be effectively reduced.

[0017] Other features and advantages of this specification will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of this specification and, together with their description, serve to explain the principles of this specification.

[0019] Figure 1 This is a schematic diagram of the wastewater conveying system of the Lyocell fiber production line in the first embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the wastewater conveying system of the Lyocell fiber production line in the second embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the wastewater conveying system of the Lyocell fiber production line in the third embodiment of this application. Detailed Implementation

[0022] To achieve the above objectives, this utility model provides a wastewater conveying system for a lyocell fiber production line, such as... Figures 1 to 3 As shown, Figure 1 This is a schematic diagram of the wastewater conveying system of the Lyocell fiber production line in the first embodiment of this application; Figure 2 This is a schematic diagram of the wastewater conveying system of the Lyocell fiber production line in the second embodiment of this application; Figure 3 This is a schematic diagram of the wastewater conveying system of the lyocell fiber production line in the third embodiment of this application. Figure 1 , Figure 2 and Figure 3 Three alternative structures for the second storage unit in this application are shown respectively.

[0023] As shown in the figure, the wastewater conveying system of the lyocell fiber production line includes a centrifugal pump 1 and a first pipe section 3 connecting the inlet of the centrifugal pump 1 to a first storage section 2 for storing wastewater. The outlet of the centrifugal pump 1 is also connected to a downstream treatment device (not shown in the figure) via a second pipe section 4.

[0024] The first pipe section 3 is also provided with a second storage section 32, which has an inlet 321 and an outlet 322. The outlet of the first storage section 2 is connected to the inlet 321 of the second storage section 32. The outlet 322 of the second storage section 32 is connected to the inlet of the centrifugal pump 1. The second storage section 32 is also provided with a water inlet 323, which is connected to or disconnected from the start-up water source (not shown in the figure) through the third pipe section 5.

[0025] In the specific operation process, the wastewater transport system includes a start-up phase and a wastewater transport phase.

[0026] During the startup phase of centrifugal pump 1, the second storage section 32 is connected to the startup water source, which injects water into the second storage section 32 and centrifugal pump 1 through the third pipeline 5 and the water inlet 323. During the water injection process, the second storage section 32 can be filled completely, or only enough to ensure the normal operation of centrifugal pump 1. After water injection, the motor of centrifugal pump 1 is started, allowing the liquid to be discharged from the outlet 322 of centrifugal pump 1.

[0027] During the wastewater transport phase, the second storage unit 32 is disconnected from the start-up water source, and the centrifugal pump 1 continues to operate, drawing wastewater from the first storage unit 2 and transporting it to subsequent units through the first pipe 3.

[0028] In the relevant technical solutions, the wastewater conveying system of the lyocell fiber production line uses self-priming pumps to transport wastewater. Self-priming pumps require self-priming capability, resulting in low efficiency and high energy consumption when handling gas-liquid mixtures, with an efficiency of only about 40%. Furthermore, the self-priming pump requires a long time to vent air during the self-priming process, leading to slow water intake and increased wear on the pump body. Therefore, the operating efficiency of the wastewater treatment system in these technical solutions is limited.

[0029] In the technical solution of this application, a centrifugal pump 1 is used instead of a traditional self-priming pump. A second storage section 32, which can be connected to or disconnected from the start-up water source, is also provided. During the start-up phase, water can be quickly injected into the second storage section 32, reducing start-up time and energy consumption. Furthermore, the centrifugal pump 1 itself is more efficient than a self-priming pump. Since the centrifugal pump 1 has no self-priming structure, it has low fluid flow resistance, and its efficiency can be increased to 70% to 90% or even higher. Therefore, the operating efficiency of the wastewater treatment system in the lyocell fiber production line can be increased, and the manufacturing cost of the lyocell fiber production line can be reduced.

[0030] Alternatively, the wastewater transfer system also includes a first one-way valve 31, which enables unidirectional flow of liquid from the first storage section 2 to the centrifugal pump 1. In the direction of liquid flow, the first one-way valve 31 is located upstream of the second storage section 32 to prevent liquid in the second storage section 32 from flowing back into the first storage section 2. This prevents liquid backflow, maintains the vacuum state within the centrifugal pump 1, and improves the success rate of the transfer system startup.

[0031] In the aforementioned embodiments, such as Figure 1 As shown, the second storage unit 32 can be a box structure.

[0032] The second storage unit 32 may also include a pipe body with at least one bend. The pipe body may include a first bend, or it may include two or more bends, as those skilled in the art can choose. This increases the space utilization of the second storage unit 32 and reduces the space occupied by the wastewater transport system.

[0033] like Figure 2 As shown, the tube body includes two bends to form a U-shaped structure, that is, the second storage section 32 is a U-shaped tube. It can also be as follows: Figure 3 As shown, the tube body also includes two bends to form a Z-shaped structure, that is, the second storage section 32 is a Z-shaped tube. The second storage section 32 can also be an L-shaped tube, an S-shaped tube, etc.

[0034] In the aforementioned embodiments, such as Figures 1 to 3As shown, the height of the liquid inlet 321 of the second storage unit 32 above the ground is greater than the height of the liquid outlet 322 above the ground. The liquid inlet 321 is located higher in the second storage unit 32 and is located above the liquid outlet 322. Due to the height difference between the liquid inlet 321 and the liquid outlet 322, gravity can be used to drive the liquid flow, reducing energy consumption.

[0035] In other embodiments, the water inlet 323 and the liquid inlet 321 can be two separate channels or the same channel. When the water inlet 323 and the liquid inlet 321 are separate channels, an adapter can be used to achieve communication and switching with the first pipe section 3 and the third pipe section 5.

[0036] In another embodiment, the water inlet 323 is located on the top surface of the second storage section 32 in the height direction. This allows the liquid to flow naturally downwards by gravity, reducing the pump's starting load and ensuring smoother water injection. Alternatively, the water inlet 323 can be located on the side of the second storage section 32, thereby bringing it closer to the inlet of the centrifugal pump 1 and reducing the pipe length.

[0037] In another alternative approach, such as Figures 1 to 3 As shown, the second storage unit 32 is equipped with a negative pressure detection device 324, which is used to detect the vacuum level of the second storage unit 32. The negative pressure detection device 324 can be a capacitive negative pressure transmitter or a resonant negative pressure transmitter, etc., which can be selected by those skilled in the art.

[0038] The negative pressure detection device 324 can monitor and control the vacuum level in the second storage section 32 in real time. For example, it can set a threshold range for the vacuum level in the second storage section 32 and issue an alarm when the vacuum level exceeds the threshold range, thereby preventing cavitation or dry running of the centrifugal pump 1. A vacuum level exceeding the threshold range may indicate a leak in the second storage section 32 or a malfunction such as pipe blockage. By monitoring the vacuum level in the second storage section 32, early warning of malfunctions in the wastewater treatment system can be provided.

[0039] In some other embodiments of this application, a filter device 33 is provided between the second storage section 32 and the first one-way valve section 31. The filter device 33 can be a basket filter, a magnetic filter, an automatic backwash filter, or a magnetic filter, etc., which can be selected by those skilled in the art. By providing the filter device 33, impurities in the liquid entering the second storage section 32 from the first storage section 2 can be effectively filtered, thereby protecting the centrifugal pump 1.

[0040] In some other embodiments of this application, a first valve 34 is provided between the drain port 322 and the inlet of the centrifugal pump 1. By adjusting the opening of the first valve 34, the flow rate of liquid entering the centrifugal pump 1 can be precisely controlled to adapt to different operating conditions. In addition, when the centrifugal pump 1 is under maintenance or the filter device is replaced, closing the first valve 34 can cut off the fluid connection between the second storage section 32 and the centrifugal pump 1 to prevent liquid leakage.

[0041] In the aforementioned embodiments, the second pipe section 4 is provided with a second one-way valve section 41, thereby preventing liquid from flowing back into the centrifugal pump 1.

[0042] Alternatively, the second pipe section 4 may also be equipped with a second valve 42, which is located downstream of the second check valve section 41 in the direction of liquid flow. This facilitates the maintenance and replacement of the centrifugal pump 1 and the second check valve section 41.

[0043] In another aspect of this application, a lyocell fiber production line is also provided, which includes a wastewater conveying system. By employing the wastewater conveying system of this embodiment, the operating cost of the lyocell fiber production line can be effectively reduced.

[0044] Compared with related technologies, the advantages of this application are:

[0045] First, by replacing the traditional self-priming pump with a centrifugal pump 1, and by providing a second storage section 32 that can be connected to or disconnected from the start-up water source, water can be quickly injected into the second storage section 32 during the start-up phase, reducing start-up time and energy consumption. Furthermore, the centrifugal pump 1 itself is more efficient than a self-priming pump. Since the centrifugal pump 1 has no self-priming structure, it has low fluid flow resistance, and its efficiency can be increased to 70% to 90% or even higher. Therefore, the operating efficiency of the wastewater treatment system in the lyocell fiber production line can be increased, and the manufacturing cost of the lyocell fiber production line can be reduced.

[0046] Secondly, by setting up a negative pressure detection device 324, the vacuum level in the second storage section 32 can be monitored and controlled in real time, which can prevent cavitation or dry running of the centrifugal pump 1. If the vacuum level exceeds the threshold range, it may indicate a leak in the second storage section 32, or it may indicate a fault such as pipe blockage. By monitoring the vacuum level in the second storage section 32, early warning of faults in the wastewater treatment system can be provided.

[0047] Third, by setting up the filter device 33, impurities in the liquid entering the second storage section 32 from the first storage section 2 can be effectively filtered, thereby protecting the second storage section 32 and the centrifugal pump 1.

[0048] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above description of the implementation methods is only for the purpose of helping to understand the core idea of ​​this utility model. It should be noted that relational terms such as "first" and "second" are only used to distinguish one component from another that has the same name, and do not necessarily require or imply any such actual relationship or order between these components.

[0049] The foregoing embodiments are merely illustrative. Those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the scope of the claims. Furthermore, those skilled in the art can combine the embodiments in part or in whole, and all technical solutions derived from such combinations fall within the scope of this patent.

Claims

1. A wastewater conveying system for a lyocell fiber production line, characterized in that, It includes a centrifugal pump (1) and a first pipe section (3) connecting the inlet of the centrifugal pump (1) to a first storage section (2), the first storage section (2) being used to store wastewater; the first pipe section (3) is also provided with a second storage section (32), the second storage section (32) being able to be connected to or disconnected from a start-up water source.

2. The wastewater conveying system for a lyocell fiber production line according to claim 1, characterized in that, It also includes a first one-way valve (31), which is located upstream of the second storage unit (32) in the direction of liquid flow.

3. The wastewater conveying system for a lyocell fiber production line according to claim 2, characterized in that, A filter device (33) is provided between the second storage section (32) and the first one-way valve section (31).

4. The wastewater conveying system for a lyocell fiber production line according to claim 1, characterized in that, The second storage section (32) is a box structure; or, the second storage section (32) includes a tube body, which is provided with at least one bend.

5. The wastewater conveying system for a lyocell fiber production line according to claim 1, characterized in that, The second storage unit (32) further includes an inlet (321) connected to the outlet of the first storage unit (2) and a outlet (322) connected to the inlet of the centrifugal pump (1); the height of the inlet (321) above the ground is greater than the height of the outlet (322) above the ground.

6. The wastewater conveying system for a lyocell fiber production line according to claim 1, characterized in that, The second storage unit (32) is provided with a negative pressure detection device (324) for detecting the vacuum level of the second storage unit (32).

7. The wastewater conveying system for a lyocell fiber production line according to claim 1, characterized in that, A first valve (34) is provided between the drain port (322) of the second storage unit (32) and the inlet of the centrifugal pump (1).

8. The wastewater conveying system for a lyocell fiber production line according to any one of claims 1-7, characterized in that, The centrifugal pump (1) is also provided with a second pipe section (4) at its outlet, which is used to connect to the inlet of the downstream device of the wastewater conveying system; the second pipe section (4) is provided with a second check valve section (41).

9. The wastewater conveying system for a lyocell fiber production line according to claim 8, characterized in that, The second pipe section (4) is also provided with a second valve (42), which is located downstream of the second check valve section (41) in the direction of liquid flow.

10. A lyocell fiber production line, characterized in that, Includes the wastewater conveying system according to any one of claims 1-9.

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