A refining machine oil agent circulating system for fiber production
By introducing a membrane filtration device and control system into the oil agent circulation system, the problem of unstable oil agent working fluid concentration was solved, the stability of oil agent working fluid concentration was achieved, the uniformity of oiling on fibers was improved, production costs were reduced, and product quality was enhanced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINJIANG SI YAYUAN IND CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-06-23
AI Technical Summary
In existing oil agent circulation systems, the flow rate of the oil agent working fluid circulation system is unstable during the oil agent production process, resulting in large fluctuations in the concentration of the oil agent working fluid. This leads to uneven concentration and instability of the oil agent working fluid, resulting in uneven oiling rate on fibers, which in turn affects production efficiency and product quality.
A refining oil circulation system is adopted, including a refining mill, an oil circulation tank, and a membrane filtration device. The membrane filtration device separates water from the working oil solution and discharges the water. The oil solution is then sent back to the oil circulation tank for use. The liquid level balance in the oil circulation tank is controlled by a level transmitter, solenoid valve, and external processor. An oil filter and bypass valve are installed to achieve stable control of the concentration of the working oil solution.
This achieved stability in the concentration of the oiling working solution, improved the uniformity of oiling on fibers, reduced production costs, decreased the burden of wastewater treatment, and enhanced product quality and production efficiency.
Smart Images
Figure CN224395249U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fiber production technology, and in particular to a refining oil circulation system for fiber production. Background Technology
[0002] Oiling agents, as indispensable chemical agents in the post-processing of fibers, play a crucial role. The oiling process aims to precisely control the surface friction of the fibers, giving them a soft and smooth feel, excellent opening properties, antistatic properties, and appropriate bundling and cohesion, thereby comprehensively improving the subsequent spinning and weaving performance of the fibers. Viscose fiber oiling agents are generally formulated into stable aqueous solutions or water emulsions. These oiling agents must meet stringent requirements such as being colorless, odorless, tasteless, non-corrosive, and having good washability. In the production of ordinary viscose fibers, the oil bath concentration is usually controlled at 8-12 g / L, and the fiber oiling rate is maintained at 0.15%-0.35%.
[0003] The main functions of the refining mill are to remove residual sulfur from fibers, bleach, rinse with soft water, and oil them. ① After passing through the fiber feeding trough, the fibers are subjected to pressure rollers to remove some of the acidic water; ② Then, they pass through a desulfurization station to remove sulfides and elemental sulfur from the fibers; ③ After washing with soft water, the alkali on the fibers is removed; ④ The fibers are bleached using sodium hypochlorite; ⑤ The fibers are washed with soft water to remove the chemicals; ⑥ The fibers are pressed out of moisture by the roller I; ⑦ The fibers are oiled with an oiling agent to improve fiber cohesion, smoothness, and antistatic properties.
[0004] In actual production, uneven oiling rates can occur, leading to a series of thorny problems:
[0005] 1. The negative impact of uneven oiling rate on production efficiency: When the oiling rate of the fiber is too low, the friction between the fiber and the spinning equipment parts increases sharply, static electricity accumulates in large quantities, and frequent breakage occurs; if the oiling rate is too high, the fiber will become too slippery, and it is very easy to slip and entangle the equipment, which seriously interferes with the stability of the processing and greatly reduces the spinning production efficiency.
[0006] 2. The adverse effects of uneven oiling rate on product quality: Uneven oiling rate will directly cause significant differences in key physical properties of fibers such as strength and elongation, ultimately reducing product quality.
[0007] Currently, the unstable expansion of the oil-based working fluid circulation tank leads to frequent fluctuations in the concentration of the working fluid, which is a direct cause of uneven oiling rates on fibers. Furthermore, excessive expansion of the working fluid can cause it to flow into wastewater and be discharged into sewage pipes, thereby increasing production costs, burdening wastewater treatment, and raising wastewater treatment costs.
[0008] In conclusion, if we can successfully overcome the technical challenges of uniform oil application, effectively control the expansion of the oil circulation tank, stabilize the concentration of the working oil solution, thereby reducing production costs, improving the oil content uniformity of fiber products, helping downstream customers improve product quality, and further enhancing the company's core competitiveness.
[0009] Research on fiber oiling processes, both domestically and internationally, mainly focuses on improving oiling uniformity, reducing oiling agent consumption, and minimizing environmental pollution. Developed countries started earlier in oiling agent research and development and process control, and their technologies are relatively mature, but they are still continuously exploring and innovating.
[0010] Existing methods for controlling the expansion of oil circulation tanks are ill-suited to complex production environments, resulting in large fluctuations in expansion and impacting the stability of the working fluid concentration. Most concentration monitoring devices lack sufficient accuracy to meet the demands of high-precision concentration control, and their concentration regulation methods are relatively lagging, failing to respond promptly to production changes. Furthermore, the oiling process lacks systematic optimization, and poor coordination among parameters hinders the effective improvement of oiling uniformity. Utility Model Content
[0011] This invention aims to provide a refining oil circulation system for fiber production. By optimizing the oiling process, it improves the uniformity of fiber oiling, resulting in more stable fiber physical properties, reduced coefficients of variation for product strength and elongation, and significantly improved product quality. This improved product quality helps the company expand into high-end markets, increase product added value, and enhance market competitiveness.
[0012] To achieve the above-mentioned objectives, the technical solution of this utility model is as follows:
[0013] A refining machine oil circulation system for fiber production includes a refining machine, an oil circulation tank, and a membrane filtration device. The refining machine includes rolling mill I, rolling mill II, and rolling mill III arranged in succession. An oiling device is installed between rolling mill I and rolling mill II. Liquid collection tanks are respectively installed at the bottom of rolling mill I, rolling mill II, rolling mill III, and the oiling device. The bottom of the liquid collection tanks is connected to the circulating liquid inlet of the oil circulation tank via pipes. The outlet of the oil circulation tank is connected to the inlet of the membrane filtration device and the oiling device via pipes. The oil outlet of the membrane filtration device is connected to the circulating liquid inlet of the oil circulation tank via a pipe. The water outlet of the membrane filtration device is connected to a water treatment device. The oil circulation tank also has an oil mother liquor inlet.
[0014] The oil circulation system of the refining machine for fiber production is also equipped with an external processor. A level transmitter is installed in the oil circulation tank, an oil circulation pump is installed at the outlet of the oil circulation tank, and a solenoid valve I is installed at the inlet of the membrane filter device. The external processor is used to receive the signal from the level transmitter, control the opening of the solenoid valve, and maintain the liquid level balance in the oil circulation tank.
[0015] The outlet of the oil circulation pump is equipped with a temperature transmitter I; an external processor is connected to the temperature transmitter I for signal reception. The main function of the temperature transmitter is to monitor the temperature of the oil working fluid in real time. If the temperature of the oil working fluid deviates from the process requirements, it may cause uneven oiling rate of the fiber or changes in the performance of the oil, affecting product quality.
[0016] The inlet of the membrane filtration device is equipped with a pressure transmitter II and a flow meter I; the oil outlet of the membrane filtration device is equipped with a pressure transmitter III and a flow meter II; the water outlet of the membrane filtration device is equipped with a flow meter III; an external processor is connected to the signals of pressure transmitter II, flow meter I, pressure transmitter III, flow meter II, and flow meter III. The external processor is used to receive signals from pressure transmitter II, flow meter I, pressure transmitter III, flow meter II, and flow meter III. Pressure transmitter I monitors the backwash water inlet pressure of the membrane equipment; temperature transmitter II monitors the backwash water inlet temperature of the membrane equipment; pressure transmitter II monitors the oil working fluid inlet pressure of the membrane equipment; flow meter I monitors the oil working fluid inlet flow rate of the membrane equipment; pressure transmitter III monitors the oil pressure after separation by the membrane equipment; flow meter II monitors and measures the amount of oil recovered through the membrane filtration device; and flow meter III monitors and measures the amount of water filtered through the membrane filtration device.
[0017] The membrane filtration device is equipped with a backwash inlet, which is equipped with a solenoid valve II, a pressure transmitter I, and a temperature transmitter II. The external processor is connected to the solenoid valve II, the pressure transmitter I, and the temperature transmitter II respectively.
[0018] The outlet of the oil circulation tank is also equipped with an oil filter. The inlet and outlet of the oil filter are connected by a bypass pipe, and a bypass valve is installed on the bypass pipe.
[0019] A pressure transmitter IV is installed at the inlet of the oil filter; the external processor is connected to the bypass valve and the pressure transmitter IV, and is used to receive the signal from the oil pressure transmitter IV and control the opening and closing of the bypass valve.
[0020] The membrane filtration device is a ceramic membrane filter or a metal membrane filter.
[0021] The beneficial effects of this utility model are:
[0022] 1. In this invention, the working solution of the oil agent is sent to a membrane filtration device, where the water in the working solution is separated and discharged. The oil agent is then sent to an oil agent circulation tank for reuse, ensuring that the liquid level in the circulation tank is stable within the process range, the concentration of the working solution of the oil agent fluctuates within the process range, and the oil content of the fiber is kept within a set range. A membrane filtration device is a device that uses a selectively permeable membrane to separate the components in a mixture. Its core function is to achieve the separation, purification, or concentration of substances through mechanisms such as physical sieving, adsorption, or charge action. Concentrating the solute: The target substance (oil agent) is retained in the working solution of the oil agent, while the solvent (water) is removed. Membrane filtration devices, with their precise separation capabilities, have become one of the key technologies in modern industry and environmental protection. The specific separation method depends on the membrane type, operating conditions, the properties of the material to be treated, and the system design, but its core advantage lies in its efficient and precise separation capabilities. The water discharged during the treatment of the working solution of the oil agent does not contain oil molecules, thus reducing water pollution.
[0023] 2. This utility model relates to a membrane filtration device equipped with a backwash inlet. Backwashing is a crucial operation for maintaining the filtration performance and extending the service life of the membrane filtration device. Its core function is to remove contaminants from the membrane surface and within the membrane pores, restoring the membrane flux (water permeability) and separation efficiency. Backwashing involves flushing with counter-current water (or gas) to remove contaminants such as particles, colloids, and biofilms adhering to the membrane surface. The reverse flow can flush out tiny particles clogging the membrane pores, restoring membrane porosity. Backwashing can recover from flux loss caused by fouling and extend membrane life. Its main benefits are reflected in contaminant removal rate, flux recovery rate, and operational stability. The actual effect is influenced by the backwashing method, operating parameters, membrane type, and fouling characteristics.
[0024] 3. In this invention, the outlet of the oil circulation tank is also equipped with an oil filter. There are two types of oil filters: one is a preliminary filter to intercept fibers in the working fluid, preventing clogging; the other is a bag filter to intercept fibers, water-insoluble solutes, impurities, iron filings, etc., in the working fluid. The preliminary filter can intercept approximately 95% of the fibers in the working fluid and requires regular cleaning. The bag filter intercepts the remaining impurities in the working fluid, such as fibers, water-insoluble solutes, impurities, and iron filings, with better interception effect. Regular cleaning is necessary during use to avoid insufficient flow affecting the process. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the refining oil circulation system for fiber production according to this utility model.
[0026] The components include: 1. Refining machine; 2. Oil circulation tank; 3. Membrane filtration device; 4. Collection tank; 5. Oil filter; 6. Bypass valve; 7. Pressure transmitter IV; 11. Rolling mill I; 12. Rolling mill II; 13. Rolling mill III; 14. Oiling device; 21. Level transmitter; 22. Oil circulation pump; 23. Temperature transmitter I; 24. Oil mother liquor inlet; 301. Solenoid valve I; 302. Pressure transmitter I; 303. Temperature transmitter II; 304. Pressure transmitter II; 305. Flow meter I; 306. Pressure transmitter III; 307. Flow meter II; 308. Flow meter III; 309. Backwash inlet; 310. Solenoid valve II; 8. Water treatment device. Detailed Implementation
[0027] The present invention will be further described in detail below with reference to the embodiments, but the implementation of the present invention is not limited thereto.
[0028] Example 1
[0029] This embodiment provides a refining oil circulation system for fiber production, including a refining machine 1, an oil circulation tank 2, and a membrane filtration device 3. The refining machine 1 includes rolling mills I 11, II 12, and III 13 arranged in succession. An oiling device 14 is provided between rolling mills I 11 and II 12. The bottom of each of the rolling mills I 11, II 12, III 13, and the oiling device 14 is provided with a liquid collection tank 4. The bottom of the liquid collection tank 4 is connected to the circulating liquid inlet of the oil circulation tank 2 through a pipe. The outlet of the oil circulation tank 2 is connected to the inlet of the membrane filtration device 3 and the oiling device 14 through a pipe. The oil outlet of the membrane filtration device 3 is connected to the circulating liquid inlet of the oil circulation tank 2 through a pipe. The water outlet of the membrane filtration device 3 is connected to a water treatment device 8. The oil circulation tank 2 is also provided with an oil mother liquor inlet 24.
[0030] The refining oil circulation system for fiber production is also equipped with an external processor. A level transmitter 21 is installed inside the oil circulation tank 2, and an oil circulation pump 22 is installed at the outlet of the oil circulation tank 2. A solenoid valve I 301 is installed at the inlet of the membrane filter device 3. The external processor receives signals from the level transmitter 21 and controls the opening of the solenoid valve to maintain the liquid level balance within the oil circulation tank 2. The membrane filter device 3 is a ceramic membrane filter.
[0031] In this embodiment, the refining machine 1 is H151A-350; the external processor model is SP243 and the type is CPU; the level transmitter 21 is a hydrostatic level transmitter; the oil circulation pump 22 model is IS150-125-250; and the solenoid valve model is Airtac (pneumatic) general-purpose solenoid valve.
[0032] In this embodiment, the liquid level balance in the oil circulation tank 2 is controlled through the following steps:
[0033] S1. The level transmitter 21 of the oil circulation tank 2 transmits real-time level data to the external processor. The oil circulation tank 2 is interlocked with the ceramic diaphragm inlet solenoid valve I301. The opening of the ceramic diaphragm inlet solenoid valve I301 is adjusted according to the level setting of the oil circulation tank 2 to ensure the stability of the level of the oil circulation tank 2. The external processor compares the level data with the preset value.
[0034] S2. When the liquid level in oil circulation tank 2 exceeds the set upper limit, the external processor controls the opening of the inlet solenoid valve I301 of the membrane filter device to increase; when the liquid level in oil circulation tank 2 is lower than the set lower limit, the external processor controls the opening of the inlet solenoid valve I301 of the membrane filter device to decrease.
[0035] In fiber production, oiling agents (also known as spinning oiling agents or fiber oiling agents) are key auxiliaries used to improve fiber processing performance. Their main functions include lubrication, antistatic properties, bundling, and moisturizing, ensuring smooth fiber processing during spinning, stretching, and winding. The concentration of the oiling agent used is 8-10 g / L. The essence of oiling fibers is to construct a functional film on the fiber surface through physical-chemical interactions; its core process is wetting-adsorption-film formation-dynamic maintenance. Because the oiling agent is carried away by the fiber during circulation, a mother liquor is added to maintain a stable concentration. The mother liquor is emulsified from pure oiling agent and demineralized water, and its concentration is typically controlled at around 155 g / L.
[0036] After being washed with soft water, the fibers are pressed through a No. 1 milling machine to expel water into a washing tank for fiber washing, thus achieving water recycling. Due to capacity and equipment limitations, it is impossible to maintain a balanced liquid level in the oil circulation tank 2, resulting in an increase in the oil volume. Therefore, a membrane filtration device 3 is needed to filter the circulating oil, removing the water and recovering the oil, thereby lowering the liquid level and water content in the oil circulation tank 2, ensuring that the concentration of the working fluid in the oil circulation tank 2 remains within the process range.
[0037] In this embodiment, the membrane filtration device 3 uses a ceramic membrane, which is resistant to high temperature and corrosion, has high mechanical strength, and is suitable for harsh environments.
[0038] The ceramic membrane filter is a mechanical filter.
[0039] Example 2
[0040] Compared with Embodiment 1, the difference in this embodiment is that a temperature transmitter I23 is provided at the outlet of the oil circulation pump 22; the external processor is connected to the temperature transmitter I23 for signal reception, and the external processor is used to receive the signal from the temperature transmitter I23. The rest of the structure is the same as in Embodiment 1.
[0041] In this embodiment, temperature transmitter I23 is a thermocouple temperature transmitter.
[0042] In this embodiment, the function of temperature transmitter I23 is as follows: it is an automated instrument used to measure the temperature of the working fluid and convert it into a standard signal output. It converts the physical quantity of temperature into a usable electrical signal, enabling accurate monitoring. Working fluids typically require steam heating; with accurate monitoring via a temperature transmitter, energy consumption can be saved, and fluctuations in the process caused by human error can be reduced.
[0043] The function of temperature transmitter I23 is to transmit and record the temperature of the working fluid, and to set the temperature range of the working fluid using the DCS system, so as to ensure that the temperature of the working fluid meets the process requirements and avoid process accidents caused by unstable fluctuations in the working fluid.
[0044] Example 3
[0045] Compared with Example 1, the difference in this embodiment is that, in this embodiment, the inlet of the membrane filtration device 3 is equipped with a pressure transmitter II 304 and a flow meter I 305; the oil outlet of the membrane filtration device 3 is equipped with a pressure transmitter III 306 and a flow meter II 307; the water outlet of the membrane filtration device 3 is equipped with a flow meter III 308; and the external processor is connected to the pressure transmitter II 304, flow meter I 305, pressure transmitter III 306, flow meter II 307, and flow meter III 308 for signal transmission.
[0046] The membrane filtration device 3 is provided with a backwash inlet 309, which is equipped with a solenoid valve II 310, a pressure transmitter I 302, and a temperature transmitter II 303. The external processor is connected to the solenoid valve II 310, the pressure transmitter I 302, and the temperature transmitter II 303 for signal transmission. The remaining structure is the same as in Embodiment 1.
[0047] In this embodiment, pressure transmitter II 304 is a piezoresistive pressure transmitter; flow meter I 305 is a differential pressure flow meter; pressure transmitter III 306 is a piezoresistive pressure transmitter; flow meter II 307 is a differential pressure flow meter; and flow meter III 308 is a differential pressure flow meter.
[0048] In this embodiment, the external processor receives signals from pressure transmitter II 304, flow meter I 305, pressure transmitter III 306, flow meter II 307, and flow meter III 308, and monitors the operating status of the membrane filtration device 3 in real time, including the liquid pressure and flow rate at the inlet of the membrane filtration device 3, the liquid pressure and flow rate at the oil outlet of the membrane filtration device 3, and the effluent flow rate at the water outlet of the membrane filtration device 3. Pressure transmitter II 304 transmits the liquid pressure at the inlet of the membrane filtration device 3 to the external processor in real time. The external processor compares this pressure data with a preset value. When it detects that the pressure of pressure transmitter II 304 exceeds the set value signal, the external processor controls solenoid valve I 301 to close. When flow meters I 305 and II 307 display a flow rate of 0, it indicates that the inlet valve is completely closed. When pressure transmitter II 304 displays a pressure of 0, the external processor controls solenoid valve II 310 to open the backwash inlet 309, performing backwashing on the membrane filter 3. When pressure transmitter III 306 displays pressure and flow meter III 308 displays flow, it indicates normal backwashing. Pressure transmitters I 302 and III 306 monitor the pressure values at the backwash inlet 309 and water outlet of the membrane filter 3 in real time and transmit them to the external processor. The external processor calculates the pressure difference between the backwash inlet 309 and water outlet of the membrane filter 3 and compares the calculated pressure difference with the set value.
[0049] When the pressure transmitter II304 detects a differential pressure signal within the process range, it indicates that backwashing is complete. The external processor controls solenoid valve II310 to close the backwash inlet 309 and open the oil working fluid inlet for filtration. The membrane filter 3 then filters the oil working fluid normally.
[0050] In this embodiment, the backwash inlet 309 is equipped with a pressure transmitter I 302 and a temperature transmitter II 303;
[0051] The function of pressure transmitter I302 is to monitor the pressure of detergent entering the equipment during backwashing, so as to avoid poor washing effect due to low pressure and equipment damage due to high pressure.
[0052] The benefits of pressure transmitter I302: Ensures effective cleaning of equipment, reduces equipment damage, guarantees equipment uptime, and extends equipment lifespan.
[0053] The function of temperature transmitter II303 is to monitor the temperature of the detergent entering the equipment during backwashing, so as to avoid poor washing effect due to low temperature and damage to the equipment due to high temperature.
[0054] The effect of temperature transmitter II303: to ensure the cleaning effect of equipment and reduce the damage of equipment parts due to high temperature.
[0055] Pressure transmitter I 302 and temperature transmitter II 303 monitor the water pressure and temperature at the backwash inlet of membrane filtration device 3 in real time and transmit the data to an external processor. The external processor compares the temperature and pressure data with preset values. When pressure transmitter I 302 and temperature transmitter II 303 detect that the pressure or temperature exceeds the set value, the external processor controls the backwash inlet valve to close to prevent equipment damage. When pressure transmitter I 302 and temperature transmitter II 303 detect that the pressure or temperature is lower than the set value, the alarm installed on the equipment sounds, reminding the operator to handle the situation as soon as possible.
[0056] In this embodiment, the core performance indicator of backwashing is:
[0057] (1) Flux recovery rate
[0058] Effect: Backwashing can restore 70% to 95% of the membrane's initial flux (depending on the degree of fouling).
[0059] Slight contamination (such as suspended particles): Flux recovery rate after backwashing can reach over 90%.
[0060] Severe pollution (such as organic matter / biofilm): Only 50%~70% can be restored, and chemical cleaning is required.
[0061] (2) Pollutant removal rate
[0062] Particulate matter / colloids: Backwashing can remove more than 80% of physical deposits on the membrane surface.
[0063] Backwashing of membrane filtration units has significant short-term effects (flux recovery, pressure reduction), but long-term stable operation requires consideration of fouling characteristics, operational optimization, and chemical cleaning. A well-designed backwashing strategy can extend membrane life by 30% to 50% and reduce overall operating costs. For highly complex fouling (such as oil-water emulsions and high-concentration organic matter), customized backwashing solutions (such as hot alkaline backwashing) are necessary.
[0064] Example 4
[0065] The difference between this embodiment and Embodiment 1 is that, in this embodiment, the outlet of the oil circulation tank 2 is further equipped with an oil filter 5, and the inlet and outlet of the oil filter 5 are connected by a bypass pipe, on which a bypass valve 6 is installed; a pressure transmitter IV7 is installed at the inlet of the oil filter 5; the external processor is connected to the bypass valve 6 and the pressure transmitter IV7, and is used to receive the signal from the oil pressure transmitter IV7 and control the opening and closing of the bypass valve 6. The rest of the structure is the same as in Embodiment 1.
[0066] In this embodiment, pressure transmitter Ⅳ7 is a piezoresistive pressure transmitter;
[0067] In this embodiment, by setting an oil filter 5 at the outlet of the oil circulation tank 2, the circulating liquid of the oil circulation tank 2 is initially filtered to reduce impurities at the oiling device 14 of the refining machine 1 and improve the fiber refining effect.
[0068] By installing a pressure transmitter Ⅳ7 at the inlet of the oil filter 5, the pressure at the inlet of the oil filter 5 is monitored in real time and transmitted to an external processor. The external processor compares the pressure data with a preset value. When the pressure transmitter Ⅳ7 detects an increase in pressure at the inlet of the oil filter 5, it indicates that the oil filter 5 is blocked. The external processor then controls the bypass valve 6 to open, and the circulating oil circulates through the bypass pipeline.
[0069] Example 5
[0070] The difference between this embodiment and embodiment 1 is that in this embodiment, the membrane filtration device 3 is a metal membrane filter, while the rest of the structure is the same as in embodiment 1.
[0071] In this embodiment, the metal membrane filter is a mechanical filter;
[0072] In this embodiment, a metal membrane is selected for the oil filtration equipment. Metal membranes are resistant to high temperatures and pressures, and produce low COD in the filtered liquid, making them suitable for specialized industrial applications. Research indicates that metal membranes are generally suitable for specialized industrial applications, but are more expensive than ceramic membranes. Based on our fiber production practices, oils are considered general chemical materials, making ceramic membranes more economical. Therefore, ceramic membranes are the preferred choice for equipment selection.
[0073] Finally, it should be noted that the liquid level balance control of the oil circulation tank 2, the temperature control of the oil working fluid, the status control of the membrane filtration device 3, and the bypass valve control of the oil filter 5 involved in this utility model are all conventional choices for chemical equipment and process control, and can be conventionally selected according to the different chemical equipment, devices, and control instruments.
[0074] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.
Claims
1. A refining oil circulation system for fiber production, characterized in that: The equipment includes a refining machine (1), an oil circulation tank (2), and a membrane filtration device (3). The bottom of the refining machine (1) is provided with a liquid collection tank (4). The bottom of the liquid collection tank (4) is connected to the circulating liquid inlet of the oil circulation tank (2) through a pipe. The outlet of the oil circulation tank (2) is connected to the inlet of the membrane filtration device (3) and the oil supply device (14) through pipes respectively. The oil outlet of the membrane filtration device (3) is connected to the circulating liquid inlet of the oil circulation tank (2) through a pipe. The water outlet of the membrane filtration device (3) is... The water treatment device (8) is connected; the oil circulation tank (2) is also provided with an oil mother liquor inlet (24); the oil circulation system of the fiber production refining machine (1) is also provided with an external processor, the oil circulation tank (2) is provided with a level transmitter (21), the outlet of the oil circulation tank (2) is provided with an oil circulation pump (22), and the inlet of the membrane filter device (3) is provided with a solenoid valve I (301); the external processor is used to receive the signal from the level transmitter (21), control the opening of the solenoid valve, and maintain the liquid level balance in the oil circulation tank (2).
2. The refining oil circulation system for fiber production according to claim 1, characterized in that: The refining machine (1) includes rolling mill I (11), rolling mill II (12) and rolling mill III (13) arranged in succession. An oiling device (14) is provided between rolling mill I (11) and rolling mill II (12). A liquid collection tank (4) is provided at the bottom of the rolling mill I (11), rolling mill II (12), rolling mill III (13) and oiling device (14).
3. The refining oil circulation system for fiber production according to claim 1, characterized in that: The outlet of the oil circulation pump (22) is equipped with a temperature transmitter I (23); the external processor is connected to the temperature transmitter I (23) via signal connection.
4. The refining oil circulation system for fiber production according to claim 1, characterized in that: The inlet of the membrane filtration device (3) is equipped with a pressure transmitter II (304) and a flow meter I (305); the oil outlet of the membrane filtration device (3) is equipped with a pressure transmitter III (306) and a flow meter II (307); the water outlet of the membrane filtration device (3) is equipped with a flow meter III (308); the external processor is connected to the pressure transmitter II (304), flow meter I (305), pressure transmitter III (306), flow meter II (307) and flow meter III (308) for signal connection.
5. The refining oil circulation system for fiber production according to claim 1, characterized in that: The membrane filtration device (3) is provided with a backwash inlet (309), and the backwash inlet (309) is provided with a solenoid valve II (310), a pressure transmitter I (302) and a temperature transmitter II (303). The external processor is connected to the solenoid valve II (310), the pressure transmitter I (302) and the temperature transmitter II (303) respectively.
6. The refining oil circulation system for fiber production according to claim 1, characterized in that: The outlet of the oil circulation tank (2) is also equipped with an oil filter (5), and the inlet and outlet of the oil filter (5) are connected by a bypass pipe, and a bypass valve (6) is installed on the bypass pipe.
7. The refining oil circulation system for fiber production according to claim 6, characterized in that: A pressure transmitter Ⅳ (7) is installed at the inlet of the oil filter (5); the external processor is connected to the bypass valve (6) and the pressure transmitter Ⅳ (7) for signal reception and control of the opening and closing of the bypass valve (6).
8. The refining oil circulation system for fiber production according to claim 1, characterized in that: The membrane filtration device (3) is a ceramic membrane filter or a metal membrane filter.