Automatic sampling and analysis of viscose insoluble production system

Abstract

The utility model relates to an automatic sampling analysis viscose insoluble production system, include: be used for filtering viscose one KKF filter machine, the slurry pump of no. The filtered viscose is delivered into the ripening barrel, the peristaltic pump of no. One KKF filter machine and no. The viscose after filtering through one KKF filter machine is pumped into the optical on -line analysis instrument in time, the ripening barrel is equipped with a plurality of detection points respectively on the axial and radial, and the viscose at detection point is transported into the optical on -line analysis instrument and is detected in time, the bottom of ripening barrel is communicated with two KKF filter machines and spinning barrel respectively, and the pipeline of ripening barrel and two KKF filter machines and spinning barrel communication is equipped with solenoid valve respectively, when the viscose of detection point detection is qualified, the viscose in ripening barrel is directly discharged into spinning barrel, when the viscose of detection point detection is unqualified, the viscose in ripening barrel is filtered after inputting two KKF filter machines and then is discharged into spinning barrel.

Description

Technical Field

[0001] This utility model relates to the field of viscose fiber production technology, specifically to an automatic sampling and analysis system for viscose insoluble matter production. Background Technology

[0002] In viscose fiber production, insoluble matter (glue particles) in the viscose dope solution can clog the spinneret caps during the spinning process, affecting production efficiency and product quality. The current solution involves adding a first KKF filter after dope preparation, followed by a second KKF filter after degassing. Both filters are KKF type, with a single motor power of 2.2 kW and filtration capacities of 5 m³ / h (first filter, 25 μm screen) and 8 m³ / h (second filter, 20 μm screen), respectively, and an inlet / outlet pressure difference of 2.5 bar. However, in actual production, when the xanthation reaction between the pulp and carbon disulfide is well controlled, the amount of insoluble matter produced is minimal, usually requiring only one filtration to meet production needs. Furthermore, current KKF filters primarily rely on changes in the filter feed pressure to determine the amount of accumulated insoluble matter; the filter's operating power has no logical control relationship with the insoluble matter content in the viscose, resulting in constant power operation. Due to the lack of a real-time quantitative detection mechanism for insoluble matter content, the current system relies solely on pressure difference changes to indirectly determine the filter clogging status, resulting in redundant energy consumption and reliance on manual labor. Utility Model Content

[0003] The main purpose of this invention is to provide an automatic sampling and analysis system for adhesive insoluble matter in production. By real-time detection of the adhesive stock solution after the first filtration, it can determine whether the insoluble matter exceeds the standard, thereby flexibly controlling the second filtration process, constructing an intelligent control mechanism, realizing the automated and precise operation of the filter, ensuring product quality, reducing production costs, and improving production efficiency.

[0004] To achieve the above objectives, this utility model provides an automated sampling and analysis system for adhesive insoluble substances in production, comprising: One KKF filter is used to filter adhesives; The No. 1 slurry pump delivers the viscose, which has been filtered by a KKF filter, into the maturation tank. The No. 1 peristaltic pump is located between the first KKF filter and the No. 1 slurry pump. The No. 1 peristaltic pump periodically draws the adhesive after it has been filtered by the first KKF filter into the optical online analyzer. The optical online analyzer is used to analyze and detect whether the adhesive is qualified. Multiple detection points are provided on the axial and radial sides of the maturation tank. The adhesive at the detection points is periodically fed into an online optical analyzer for detection. The bottom of the aging tank is connected to the second KKF filter and the spinning drum, respectively. Solenoid valves are installed on the pipes connecting the aging tank to the second KKF filter and the spinning drum. When the adhesive detected at the testing point is qualified, the adhesive in the aging tank is directly discharged into the spinning drum. When the adhesive detected at the testing point is unqualified, the adhesive in the aging tank is filtered in the second KKF filter and then discharged into the spinning drum.

[0005] Preferably, the waste adhesive filtered by a KKF filter is collected into a waste adhesive collection tank.

[0006] Preferably, the waste adhesive filtered by the second KKF filter is collected into a waste adhesive collection tank.

[0007] Preferably, the aging barrel has six sampling point groups along its axial direction.

[0008] More preferably, each sampling point group has five sampling points, which are evenly distributed along the radial direction of the maturation barrel.

[0009] Preferably, when the sampled adhesive extracted by the No. 1 peristaltic pump is delivered to the optical online sampling analyzer, and the optical online sampling analyzer detects more than 5 insoluble adhesive particles larger than 25μm, the No. 1 slurry pump is started, and the adhesive after being filtered by a KKF filter is delivered into the maturation tank.

[0010] Preferably, when there are more than 5 insoluble adhesive particles larger than 20 μm in the sampling point of the aging tank, the No. 2 slurry pump will transport the adhesive in the aging tank into the No. 2 KKF filter for filtration.

[0011] In a further preferred embodiment, when no insoluble adhesive particles larger than 20 μm are detected in the viscose at the sampling point in the maturation tank, the No. 2 slurry pump transports the viscose in the maturation tank into the spinning tank.

[0012] The beneficial effects of this utility model are as follows: 1. Reduce costs: Through precise testing, only batches with excessive insoluble matter are subjected to secondary filtration, reducing the ineffective operating time of the No. 2 KKF filter, lowering the energy consumption of the 2.2kW motor, saving more than 63% energy compared to the traditional dual-stage filtration mode, and saving ≥150,000 kWh of electricity per production line per year.

[0013] 2. Improve production efficiency: This avoids unnecessary secondary filtration processes, shortens the production cycle, and improves the production efficiency of viscose fiber. 3. Guarantee product quality: Real-time online detection can promptly detect abnormalities in insoluble substances in viscose solution, ensuring that the quality of viscose solution entering the spinning process meets the standards, effectively extending the life of spinning components by more than 200 hours, and improving the yield of superior products. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a schematic diagram of the production system of this utility model.

[0016] Explanation of reference numerals in the attached figures 2. One KKF filter; 3. One slurry pump; 4. One peristaltic pump; 41. Time relay No. 1; 5. Maturation barrel; 6. Sampling point; 61. Time relay No. 2; 62. Peristaltic pump No. 2; 7. Slurry pump No. 2; 8. Two-stage KKF filter; 9. Spinning drum; 10. Metering pump; 100. Waste glue collection tank. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0018] like Figure 1 As shown, this embodiment is based on the existing production line in the viscose fiber production workshop, and an automatic sampling and analysis system for viscose insoluble matter is built. The core equipment and connection relationships are as follows: The core filtration unit consists of a primary KKF filter 2 (model KKF-12, manufactured by Lenzing AG, Austria) and a secondary KKF filter 8 (same model). Both filters have a single motor power of 2.2kW. The primary KKF filter 2 has a filter mesh size of 25μm and a filtration capacity of 5m³ / h, while the secondary KKF filter 8 has a filter mesh size of 20μm and a filtration capacity of 8m³ / h. The inlet and outlet pressure difference for both filters is set to 2.5 bar. Waste adhesive discharged from both filters is piped to a waste adhesive collection tank 100 for centralized waste adhesive treatment.

[0019] Conveying and Sampling Unit: A peristaltic pump 4 (model S400-3B+JZ15, Baoding Sino Fluid Technology Co., Ltd.) is installed on the conveying pipeline between the outlet of the first KKF filter 2 and the first slurry pump 3 (model TLB6-3C-40, Jiangsu Jiuhong Pump Industry Co., Ltd.), and a time relay 41 (model DUA01CB, Shanghai Yuezhong Electrical Equipment Co., Ltd.) is configured to control its operation; the outlet of the first slurry pump 3 is connected to the maturation tank 5, which is responsible for conveying the first filtered adhesive into the maturation tank 5.

[0020] Detection Unit: Equipped with an online optical analyzer (model YH-MIP-0103, Shanghai Yinhuang Technology Co., Ltd.). This instrument includes an optical microscopic imaging module with a 50X / 100X switchable lens for detecting insoluble adhesive particles in the viscose stock solution. Inside the maturation tank 5, according to ISO9276-1 standards, 6 sampling points (6 groups) are set along the axial direction (upper / middle / lower layers). Each sampling point group is equipped with a second peristaltic pump 62, which can simultaneously collect viscose from 5 sampling points 6. Each sampling point group has 5 sampling points 6 evenly distributed radially (near the wall / center, etc.), for a total of 30 sampling points 6. Each sampling point 6 corresponds to a second peristaltic pump 62 (same model S400-3B+JZ15), and the sampling frequency is uniformly controlled by a second time relay 61.

[0021] Subsequent processing unit: The bottom of the maturation tank 5 is connected to the second slurry pump 7 (same model TLB6-3C-40) and the spinning tank 9 via two pipes. One pipe connects to the second KKF filter 8 via the second slurry pump 7, and the other pipe connects directly to the spinning tank 9. Solenoid valves are installed on both pipes to control the material flow. The outlet of the spinning tank 9 is connected to the metering pump 10 (model JN60D, Ningbo Yongdachi Chemical Fiber Technology Co., Ltd.). The outlet of the metering pump 10 is connected to the spinning machine. When the adhesive level in the spinning tank 9 is higher than 50%, the metering pump 10 is started to transport the adhesive to the spinning machine for spinning.

[0022] The system operation flow in this embodiment is as follows: Sampling and testing after filtration: The sampling interval of the first peristaltic pump 4 is set to 15 minutes via the first time relay 41 (adjustable within 0.1-60 minutes). Before each sampling, the control system (the control system refers to the control system of the automatic sampling and analysis system for adhesive insoluble matter; the start and stop of all electronic devices below are controlled by the control system) controls the first peristaltic pump 4 to run for a preset time to purge the existing material in the pipeline, ensuring that the adhesive sample delivered to the optical online analyzer is fresh. The optical online analyzer uses a 50X field of view (0.38mm in diameter) to detect the sample. If more than 5 insoluble adhesive particles larger than 25μm are detected, the control system marks the batch of adhesive in the production management system and controls the first slurry pump 3 to start, delivering the batch of adhesive to the maturation tank 5; if the limit is not exceeded, the adhesive is directly delivered to the maturation tank 5 via the first slurry pump 3 without marking.

[0023] Sampling and testing within maturation tank 5: For unmarked adhesive batches within maturation tank 5, the initial sampling frequency of peristaltic pump 62 is set to 20 min / time. If five consecutive tests show "≤2 insoluble adhesive particles larger than 20 μm within a 50X field of view," the sampling frequency is reduced to 30 min / time. If "≥3 insoluble adhesive particles larger than 20 μm within a 50X field of view" are detected, the sampling frequency is automatically increased to 10 min / time. For marked adhesive batches, the sampling frequency of peristaltic pump 62 is fixed at 10 min / time, and all peristaltic pumps 62 operate synchronously to ensure spatial representativeness of the samples.

[0024] Secondary filtration control and subsequent processes: When the optical online analyzer detects that there are more than 5 insoluble adhesive particles larger than 20μm in the adhesive at sampling point 6 inside the curing tank 5 within a 50X field of view, the control system controls the solenoid valve at the bottom of the curing tank 5 connected to the second slurry pump 7 to open, while simultaneously closing the solenoid valve directly connected to the spinning drum 9. The second slurry pump 7 then transports this batch of adhesive to the second KKF filter 8 for filtration. The qualified adhesive after filtration is then transported to the spinning drum 9. If "no insoluble adhesive particles larger than 20μm are detected within a 50X field of view," the solenoid valve connected to the second slurry pump 7 is closed, and the solenoid valve directly connected to the spinning drum 9 is opened, allowing the adhesive to directly enter the spinning drum 9. Once the adhesive level in the spinning drum 9 meets the production requirements (≥50%), the metering pump 10 is started to transport the adhesive to the spinning machine, initiating the spinning process.

[0025] The beneficial effects of this embodiment are: Cost reduction: This system activates secondary filtration only for batches of adhesives with excessive insoluble matter through precise detection, significantly reducing the ineffective operating time of the secondary KKF filter 8 and reducing the energy consumption of the 2.2kW motor. It saves more than 63% energy compared to the traditional fixed dual-stage filtration mode. It is estimated that a single production line can save ≥150,000 kWh of electricity per year.

[0026] Efficiency Improvement: For viscose batches that meet the insoluble matter standard, the second filtration process is skipped directly, shortening the production cycle from filtration to spinning and significantly improving the overall production efficiency of viscose fibers.

[0027] Quality Assurance: The real-time online detection mechanism can promptly detect abnormalities in insoluble substances in the viscose solution, ensuring that the quality of viscose entering the spinning machine meets the standards, effectively extending the life of the spinning components by more than 200 hours, and improving the yield of superior viscose fiber products.

[0028] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. An automatic sampling and analyzing viscose insoluble production system, characterized by, include: A KKF filter, the KKF filter being used to filter adhesives; The No. 1 slurry pump delivers the viscose filtered by the KKF filter into the maturation tank. A peristaltic pump is installed between the first KKF filter and the first slurry pump. The peristaltic pump periodically draws the adhesive filtered by the first KKF filter into an online optical analyzer. The online optical analyzer is used to analyze and detect whether the adhesive is qualified. The maturation tank is provided with multiple detection points on both the axial and radial sides, and the adhesive at the detection points is periodically fed into the optical online analyzer for detection. The bottom of the maturation tank is connected to the second slurry pump and the spinning drum via two pipes. One of the pipes connects to the second KKF filter via the second slurry pump. Solenoid valves are installed on the pipes connecting the maturation tank to the second KKF filter and the spinning drum. When the adhesive detected at the detection point is qualified, the adhesive in the maturation tank is directly discharged into the spinning drum. When the adhesive detected at the detection point is unqualified, the adhesive in the maturation tank is filtered in the second KKF filter before being discharged into the spinning drum.

2. The automatic sampling and analysis of viscose insoluble production system according to claim 1, characterized in that, The waste adhesive filtered by the KKF filter is collected in the waste adhesive collection tank.

3. The automatic sampling and analysis of viscose insoluble production system according to claim 1, characterized in that, The waste adhesive filtered by the two KKF filters is collected into the waste adhesive collection tank.

4. The automatic sampling and analysis of viscose insoluble production system according to claim 1, characterized in that, The maturation tank has six sampling point groups along its axial direction.

5. The automatic sampling and analysis of viscose insoluble production system according to claim 4, characterized in that, Each sampling point group has five sampling points, which are evenly distributed along the radial direction of the maturation barrel.

6. The automatic sampling and analysis of viscose insoluble production system according to claim 1, characterized in that, When the sampled adhesive extracted by the No. 1 peristaltic pump is delivered to the optical online sampling analyzer, and the optical online sampling analyzer detects more than 5 insoluble adhesive particles larger than 25μm, the No. 1 slurry pump is started, and the adhesive filtered by the first KKF filter is delivered into the maturation tank.

7. The automatic sampling and analysis of viscose insoluble production system according to claim 1, characterized in that, When the number of insoluble adhesive particles larger than 20 μm in the sampling point of the maturation tank exceeds 5, the second slurry pump transports the adhesive in the maturation tank into the second KKF filter for filtration.

8. The automatic sampling and analysis of viscose insoluble production system according to claim 7, characterized in that, When no insoluble adhesive particles larger than 20 μm are detected in the viscose at the sampling point in the maturation tank, the second slurry pump delivers the viscose from the maturation tank into the spinning tank.

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