Energy saving and consumption reduction have always been an important topic for compact spinning enterprises. What factors affect production? Energy consumption during the process?
In order to study the factors affecting the power consumption of the DTMl29 compact spinning frame, experimental analyzes were conducted on the diameter of the compact spinning main motor and the compact spinning impeller. Compact spinning main motors of 6.3 kW and 5.5 kW were selected for comparative study. The test results showed that the power consumption of the two motors was similar, indicating that the main motor was not the main factor affecting power consumption. The influence of impeller diameter on energy consumption in compact spinning units was analyzed. By comparing the measured power of impeller diameters of 98 mm and 107 mm, it was found that the energy consumption of the former was significantly lower than that of the latter by about 37%, indicating that the compact spinning device itself is the main factor affecting power consumption.
Exploring the influencing factors of power saving
Through the above research, it was found that closely The spinning device itself is the main factor affecting power consumption. In order to further study the factors affecting the energy consumption of the compact spinning machine, the relevant components were explored one by one and the spinning quality was tracked. At present, the main motor pulley diameter of compact spinning is 125 mm. In order to study its influence, pulleys with diameters of 120 mm, 115 mm, and 109 mm were made and tested with CJ14.5tex yarn. The study found that the negative pressure value of some spindles of the 109 mm diameter pulley did not meet the requirements, while the negative pressure of the 115 mm and 120 mm diameter pulleys could both meet the requirements. Test data shows that a pulley with a diameter of 115 mm saves 26% more energy than a pulley with a diameter of 120 mm, and a pulley with a diameter of 120 mm saves 12% more energy than a pulley with a diameter of 125 mm. The results of testing the influence of different pulleys on the bobbin and package quality indexes showed that the bobbin indicators under the four pulley diameters were relatively stable, but the nep index of the package yarns with compact spinning pulley diameters of 115 mm and 120 mm was slightly worse; while the pulley diameters were relatively stable. When the diameter is 109 mm, except for strength, all other indicators are poor. After comprehensive consideration, the main motor pulley of the compact spinning machine was selected to be 115 mm.
In order to study the impact of the negative pressure tube model on the energy consumption of compact spinning, the selection of negative pressure tubes in the compact spinning device was carried out In the process, the spinning machine impeller was replaced with a 98 mm small impeller, the matching volute and tee joint were installed, and D-type, E-type and F-type negative pressure tube tests were conducted. The experimental varieties were CJ14.5tex, and CJ27. 8tex. Analysis of the test data found that except for the difference in strength CV, all other indicators of the F-type negative pressure tube are relatively stable. In particular, the hairiness index is better than that of the E-type and D-type negative pressure tubes. However, when spinning coarse special yarns, it was found that the quality indicators of the F-type negative pressure tube and the E-type negative pressure tube were not as good as the D-type negative pressure tube. This was mainly due to the smaller opening of the F-type negative pressure tube and the E-type negative pressure tube. , and when spinning thick special yarns, the slivers are relatively scattered in the gathering area. Coupled with the influence of the yarn guide stroke, the negative pressure tube with a small opening is not conducive to the gathering of slivers. After analyzing the above experimental results, it was finally determined that using a 98 mm small impeller with an F-type negative pressure tube would increase the negative pressure value in the accumulation area and reduce hairiness by approximately 27.9%.
After putting the mesh circle on the machine, it was found that whether it was a mesh circle with a diameter of 36.5 mm or 37.5 mm, the mesh circle was pinched to varying degrees, and the fine special yarn was not very Obviously, the thick special yarn has a greater impact. This is mainly due to the large negative pressure of the newly installed F-type negative pressure tube, which easily absorbs free flying flowers and short lint. This phenomenon was eliminated when using a black carbon-coated anti-static mesh ring. Therefore, it was finally decided to use a carbon-coated anti-static mesh ring. For fine special yarns, a mesh ring with a diameter of 37.5 mm can be used to match the F-type negative pressure tube.
The benefits of energy-saving renovation are significant
According to the above test plan, DTMl29 Model compact spinning frame was renovated, all using 98 mm small impellers, installing matching volutes and tee joints, using F-type negative pressure tubes and carbon-coated anti-static mesh rings, and carrying out power saving and quality tracking ( Note: After modification, the negative pressure must be above 2.4 kPa, and the bell mouth position must be adjusted to make the whiskers adapt to the opening position of the F-type negative pressure pipe). The energy-saving effect and yarn quality indicators after the transformation are shown in Table 1 and Table 2. It can be seen from Table 1 that after the transformation, the measured electric power was reduced by 1.5 kW, an actual reduction of 30.6%, and the energy saving effect was obvious; from Table 2, it can be seen that the evenness, hairiness, and minimum strength indicators of the package yarn after the transformation were better than before the transformation.
Based on the above best transformation plan for a spinning mill 24 DTM129 spinning machines were renovated. The calculated mechanical cost for the renovation was 4,453.6 yuan per unit, totaling approximately 1.176 million yuan; the disassembly and assembly cost for each unit was 198 yuan, totaling 4,752 yuan. Calculated based on the output of 14.5 tex, the impact on production cost is 9422.8 yuan per unit, totaling about 226,000 yuan; the total transformation cost is about 1.41 million yuan. After the transformation, each unit will save about 80,000 yuan in electricity bills, totaling 1.92 million yuan. Therefore, the plant has saved approximately 550,000 yuan in cost after renovation. </p
