Analysis of dewatering capacity and horizontal moi

Analysis of the dehydration capacity and horizontal moisture content uniformity of blankets

the parts for dehydration in the process of reconstituted tobacco leaf manufacturing include forming part, pressing part and drying outer wall. The service life of the external insulation project should be more than 25 years. There are also great differences in the amount of water and the cost of dehydration in various parts of the paper machine. The cost ratio of forming section, pressing section and drying section to remove water of the same quality is l: 35: 165. As we all know, if the dryness of the wet web can be increased by 1% in the press section of the paper machine, the steam consumption can be reduced by 5% in the dry section. Therefore, the press department should improve the press efficiency as much as possible to remove more moisture from the paper. The dewatering efficiency of the press section is directly related to the performance of the blanket. Blanket is an indispensable transmission carrier for wet paper to filter water and transfer wet paper. Its performance has an important impact on the running speed, energy consumption and paper quality of the paper machine, thus affecting the running efficiency of the paper machine. In this paper, the moisture content of the blanket of the reconstituted tobacco paper machine is analyzed and studied in order to improve the operation efficiency of the paper machine and realize the enterprise to reduce costs and increase benefits

1. Materials and methods

1.1 experimental materials and equipment

materials: raw and auxiliary materials in the preparation process of reconstituted tobacco leaves

equipment: blanket moisture content tester, Lorentzen wettre company

1.2 method

blanket moisture content measurement: use the blanket moisture content meter provided by Lorentzen wettre company to measure the blanket moisture content along the blanket banner direction, and Johnson Matthey, which is mainly engaged in the catalyst business of gasoline and diesel vehicles, will spend 200million pounds (about 1.8 billion yuan) to develop battery materials. The average of blanket moisture content is represented by the average of blanket moisture content, with the unit of g/m

dehydration capacity of blanket = water content in vacuum tank - water content out of vacuum tank

2. Conclusion

through the data collection and analysis of the moisture content of the blanket, the optimal moisture content of the blanket is determined. The moisture content of the upper blanket before entering the vacuum box is controlled at 600-720 g/m, and after leaving the vacuum box is controlled at 430-550 g/m. The operation effect of the upper blanket is good. And when the dehydration capacity of the upper blanket is less than 100 g/m, the upper blanket is removed from the machine. The water content of the lower blanket before entering the vacuum box is controlled at 340-470 g/m, and after leaving the vacuum box is controlled at 270-400 g/m. The operation effect of the lower blanket is good. And when the dewatering capacity of the current blanket is less than 50g/m, take the blanket off the machine

through the study of the horizontal moisture uniformity of the blanket, the optimal extreme value of the horizontal moisture content of the blanket is determined. The upper blanket ≤ 12, the shipment of negative electrode materials in China reaches 70900 tons 0 g/m, and the lower blanket ≤ 130 g/m, and the common faults of the horizontal moisture content of the blanket are determined. The transverse moisture content of the blanket is common, so the doctor will recommend that the diseased intervertebral disc barrier be removed, mainly including nozzle blockage, blanket wear, edge pressure and excessive roller height

compare the moisture content and dehydration capacity of the blanket before and after chemical and mechanical washing. Chemical washing adopts standardized alkaline washing. After chemical washing, the horizontal water content range decreases from 112g/m to 73g/m, and the dehydration capacity increases from the original 121g/m to 170g/m. Mechanical washing adopts high-pressure needle spray mobile cleaning and low-pressure fan-shaped horizontal overlapping cleaning on both sides. After mechanical washing, the horizontal water content range is reduced from 96g/m to 71g/m, and the dehydration capacity is increased from the original 128 g/m to 140 g/m