\n| polyester fibre<\/td>\n | Polyester long fibre filter cloth has smooth surface, good abrasion resistance, high strength, higher strength and better abrasion resistance through twisting, thus the fabric has good air permeability, fast water leakage and easy cleaning.<\/td>\n | Polyester staple fibre filter cloth raw material structure is short and hairy, woven fabrics are dense, particle retention is good, but peeling, air permeability is poor. Strength and abrasion resistance, water leakage is not as good as polyester long fibre filter cloth.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n 1.3 Filter cloth preparation<\/p>\n According to the weaving method of filter cloth can also be divided into three kinds: plain, twill and satin.<\/p>\n Plain filter cloth has dense structure and small pores, so it has good particle retention, high filtrate clarification, long service life and cheaper price. The disadvantage is that the specific resistance is large, easy to clog, and the performance of slag discharge is poor.<\/p>\n Satin weave fabric has the largest pores, small specific resistance, not easy to plug, good sludge stripping performance. However, the particle retention capacity is low, the filtrate is turbid, and the recovery rate is low.<\/p>\n The performance of twill filter cloth is between plain and satin, but it is widely used because of its strong friction resistance, high filtration speed and longest life.<\/p>\n Requirements for filter cloth of plate and frame filter presses for urban wastewater treatment plants<\/p>\n Urban sewage treatment plant sludge production is larger, the work intensity is higher, the filter cloth is often used repeatedly extrusion, need to have a certain tensile strength, no stretch, good dimensional stability, the mechanical strength of the filter cloth requirements are higher; in the sludge conditioning and tempering process is often required to add PAM, iron salts, aluminium salts or lime and other agents, the sludge nature of the sludge is more complex, the sludge is alkaline after the conditioning, the filter cloth should be able to have a certain degree of Corrosion resistance.<\/p>\n Urban sewage treatment plant sludge is mainly organic particles, fine particles, the need for relatively small pore filter cloth, filtration filtrate to be clearer, conducive to improving the recovery rate of sludge; filter cloth permeability is also good, fast filtration speed, faster discharge of water out of the sludge, to improve the efficiency of the plate and frame machine; filter cloth should not be clogged; filter cloth dewatering of sludge after the stripping of the good, the mud cake in the plate and frame machine can be automatically stripped after the opening of the frame; easy to rinse the regeneration, to extend the use cycle, reduce the cost of using the cloth. The filter cloth is easy to be washed and regenerated, which prolongs the use cycle and reduces the use cost.<\/p>\n Therefore, in the plate and frame filter press cloth selection, to be able to meet the following requirements: high strength, corrosion resistance, filtrate clear, fast water permeability, not easy to plug, easy to peel, long life.<\/p>\n 3<\/b><\/strong>Analysis of test data<\/p>\nAccording to the actual processing experience, for the above requirements, combined with the characteristics of the material, urban wastewater treatment plant plate and frame filter press dewatering machine filter cloth should be used for polypropylene or polyester filter cloth, the material composition of the selection of monofilament or filament filament long fibre, the preparation of choice of commonly used twill pattern, and will be the two kinds of filter cloth for testing and comparison, as shown in Table 3.<\/p>\n \n\n\n| Filter cloth number<\/td>\n | material (that sth is made of)<\/td>\n | framework<\/td>\n | Presentation<\/td>\n<\/tr>\n | \n| 1# Filter Cloth<\/td>\n | polypropylene fiber<\/td>\n | multifilament long fiber<\/td>\n | twill<\/td>\n<\/tr>\n | \n| 2# Filter Cloth<\/td>\n | Polyester Unity;<\/td>\n | monofilament<\/td>\n | twill<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n A plate and frame filter press with a filtration area of 4 n? was used in the test, the maximum pressing pressure was 15 kgf and the maximum closing pressure was 12 kgf, and two types of filter cloths as shown in Table 3 were used to analyse the sludge treatment under the conditions of different concentration of chemicals and different types of chemicals.<\/p>\n The sludge used for the test was the thickened sludge from the Shidongkou Sewage Treatment Plant, and the chemicals used were fly ash from sludge drying and incineration, ferric chloride and cationic polyacrylamide.<\/p>\n 3.1 Effect of different agents on the water content of filter fabrics<\/p>\n The test selected the common types of chemicals added, combined with the selection of plate and frame filter presses under different filter cloth conditions, water content and other conditions of the analysis,\" as shown in Table 4.<\/p>\n \n\n\n| batches<\/td>\n | Water content of feed mud\/%<\/td>\n | Proportion of dosage<\/td>\n | press-fit (e.g. seam sealing)<\/td>\n | extract juice, oil etc by squeezing<\/td>\n | –<\/b><\/strong>Cloth_Filter Type<\/b><\/strong>–<\/b><\/strong><\/td>\n| Cake moisture content<\/p>\n \/%<\/td>\n<\/tr>\n | \n| fly ash<\/p>\n \/%<\/td>\n | carnallite (hydrated potassium magnesium chloride mineral)<\/p>\n \/%<\/td>\n | PAM<\/p>\n (+)\/%<\/td>\n | Pressure\/kgf<\/td>\n | Time\/min<\/td>\n | strains<\/p>\n \/kgf<\/td>\n | Time\/min<\/td>\n<\/tr>\n | \n| 1<\/td>\n | 97.2<\/td>\n | 10.0<\/td>\n | 0<\/td>\n | 0.015<\/td>\n | 11.5<\/td>\n | 90<\/td>\n | 15<\/td>\n | 60<\/td>\n | 1# Filter Cloth<\/p>\n 2# Filter Cloth<\/td>\n | 78.1<\/p>\n 79.7<\/td>\n<\/tr>\n | \n| 2<\/td>\n | 97.3<\/td>\n | 0<\/td>\n | 7.0<\/td>\n | 0<\/td>\n | 11.5<\/td>\n | 90<\/td>\n | 12<\/td>\n | 60<\/td>\n | 1# Filter Cloth<\/p>\n 2# Filter Cloth<\/td>\n | 69.6<\/p>\n 68.5<\/td>\n<\/tr>\n | \n| 3<\/td>\n | 97.1<\/td>\n | 20.0<\/td>\n | 8.0<\/td>\n | 0.014<\/td>\n | 11.5<\/td>\n | 90<\/td>\n | 12<\/td>\n | 60<\/td>\n | (Cant.) plural for pronouns<\/p>\n 2 luminescent cloth<\/td>\n | 65.9<\/p>\n 65.3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n <\/p>\n From the water content of the mud cake, without adding iron salt, the water content of the mud cake of 2# filter cloth is higher than that of 1# filter cloth, and after adding iron salt, the water content is obviously reduced, and the water content of 2# filter cloth is lower.<\/p>\n 3.2 The effect of different dosage on the water content of the filter cloth<\/p>\n The test selected in the iron salt dosage fixed, fly ash dosage changing conditions, two filter cloth filtration after the water content of the situation shown in Table 5.<\/p>\n From Table 5, it can be seen that due to the better water permeability of the 2# filter cloth, the reduction of water content is particularly obvious with the increase of the concentration of fly ash injection.<\/p>\n \n\n\n| batches<\/td>\n | Water content of feed mud\/%<\/td>\n | Proportion of dosage<\/td>\n | press-fit (e.g. seam sealing)<\/td>\n | extract juice, oil etc by squeezing<\/td>\n | -Types of filter cloth<\/td>\n | Cake moisture content<\/p>\n \/%<\/td>\n<\/tr>\n | \n| fly ash<\/p>\n \/%<\/td>\n | carnallite (hydrated potassium magnesium chloride mineral)<\/p>\n \/%<\/td>\n | PAM<\/p>\n (+)<\/td>\n | strains<\/p>\n \/kgf<\/td>\n | Time\/min<\/td>\n | Pressure\/kgf<\/td>\n | Time\/min<\/td>\n<\/tr>\n | \n| 1<\/td>\n | 97.0<\/td>\n | 25.0<\/td>\n | 7.0<\/td>\n | 0<\/td>\n | 11.5<\/td>\n | 90<\/td>\n | 12<\/td>\n | 60<\/td>\n | 1# Filter Cloth<\/p>\n 2# Filter Cloth<\/td>\n | 65.1<\/p>\n 65.2<\/td>\n<\/tr>\n | \n| 2<\/td>\n | 97.4<\/td>\n | 30.0<\/td>\n | 7.0<\/td>\n | 0<\/td>\n | 11.5<\/td>\n | 90<\/td>\n | 12<\/td>\n | 60<\/td>\n | 1# Filter Cloth<\/p>\n 2# Filter Cloth<\/td>\n | 57.5<\/p>\n 55.9<\/td>\n<\/tr>\n | \n| 3<\/td>\n | 97.1<\/td>\n | 45.0<\/td>\n | 7.0<\/td>\n | 0<\/td>\n | 11.5<\/td>\n | 85<\/td>\n | 12<\/td>\n | 60<\/td>\n | 1# Filter Cloth<\/p>\n 2# Filter Cloth<\/td>\n | 53.5<\/p>\n 52.1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n 3.3 Comparative analysis<\/p>\n Combining the above test results, a comparative analysis of the two filter cloths is shown in Table 6.<\/p>\n \n\n\na meter (measuring sth)62<\/b><\/strong>Indicators for the evaluation of filter clothsTab.<\/b><\/strong>6<\/b><\/strong>Performanceof<\/b><\/strong>2<\/b><\/strong>Filters<\/b><\/strong><\/td>\n<\/tr>\n\n| Evaluation indicators<\/td>\n | 1# Filter Cloth<\/td>\n | 2# Filter Cloth<\/td>\n<\/tr>\n | \n| Dehydrated moisture content<\/td>\n | your (honorific)<\/td>\n | lower (one's head)<\/td>\n<\/tr>\n | \n| turbid filtrate<\/td>\n | surname Qing<\/td>\n | impure<\/td>\n<\/tr>\n | \n| Automatic shedding<\/td>\n | differ from<\/td>\n | (of an unmarried couple) be close<\/td>\n<\/tr>\n | \n| permeability<\/td>\n | (following a decimal or fraction) slightly less than<\/td>\n | vigorous<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\nreach a verdict<\/h2>\nWith the growth of urban population, the continuous improvement of municipal services, sewage treatment technology innovation and the deepening of the degree of treatment, the amount of sludge produced in the process of sewage treatment will increase greatly, sludge dewatering and reduction is imperative, plate and frame machine as a more commonly used treatment equipment, the development prospects are broader.<\/p>\n ![\"\u9694\u819c\u538b\u6ee4\u673a\u6ee4\u5e03\u9009\u578b-\u677f\u6846\u53a2\u5f0f\u9694\u819c\u538b\u6ee4\u673a\"](\"https:\/\/www.xiaoxianmi.cn\/wp-content\/uploads\/2022\/05\/2022050215094920.webp\" "\\"\u9694\u819c\u538b\u6ee4\u673a\u6ee4\u5e03\u9009\u578b-\u677f\u6846\u53a2\u5f0f\u9694\u819c\u538b\u6ee4\u673a\\"") <\/p>\n
The selection of filter cloth for plate and frame machine is very important, which needs to be considered comprehensively with a number of factors such as filtrate, water content of sludge cake, and the cost of use, etc. While summarising the nature of sludge and the characteristics of the treatment process of municipal sewage treatment plant, two commonly used filter cloths were selected for the experimental study, and the results showed that the polyester monofilament twill filter cloth was able to get a lower water content, but the filtrate was more turbid, and the recovery rate of the sludge dewatering was lower, while the Polypropylene compound filament twill filter cloth has a higher water content, but the filtrate recovery is good. Each sewage treatment plant can choose the appropriate filter cloth according to its own situation, to achieve the purpose of reducing the water content and improving the efficiency of use.<\/p>\n
\nTechnical: 188517-18517<\/strong><\/p>\nE-mail: suton@su-ton.com<\/strong><\/p>","protected":false},"excerpt":{"rendered":"\u5f15\u8a00 \u6839\u636e\u56fd\u5bb6\u4f4f\u623f\u548c\u57ce\u4e61\u5efa\u8bbe\u90e8\u7edf\u8ba1\u6570\u636e\uff0c\u5168\u56fd\u8bbe\u5e02\u57ce\u5e02\u3001\u53bf\u7d2f\u8ba1\u5efa\u6210\u57ce\u9547\u6c61\u6c34\u5904\u7406\u53822832\u5ea7\uff0c\u6c61\u6c34\u5904\u7406\u80fd\u529b\u8fbe\u52301. […]<\/p>","protected":false},"author":1,"featured_media":5023,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[183],"tags":[383],"class_list":["post-5022","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-jswx","tag-ylvxxjs"],"featured_image_url":"https:\/\/www.xiaoxianmi.cn\/wp-content\/uploads\/2022\/06\/2022060222223488.webp","terms_info":[{"term_id":183,"name":"\u6280\u672f\u6587\u732e","slug":"jswx","term_group":0,"term_taxonomy_id":183,"taxonomy":"category","description":"SU-TON\u5f00\u901a\u6280\u672f\u6587\u732e\u4e13\u6ce8\u4e0e\u6c61\u6c34\u884c\u4e1a\u6587\u732e\u3002\u6536\u96c6\u4e86\u6c61\u6c34\u884c\u4e1a\u6700\u65b0\u6295\u7a3f\u4f5c\u54c1\u4e0e\u514d\u8d39\u6700\u65b0\u9009\u9898\uff0c\u51e0\u4e4e\u6240\u6709\u7684\u73af\u4fdd\u4eba\u90fd\u80fd\u514d\u8d39\u5728SU-TON\u4e0b\u8f7d\u6587\u7ae0\u3002\u6bcf\u5929\u66f4\u65b0\u3002\r\n","parent":0,"count":717,"filter":"raw"}],"keywords":"","_links":{"self":[{"href":"https:\/\/www.xiaoxianmi.cn\/en\/wp-json\/wp\/v2\/posts\/5022","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xiaoxianmi.cn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xiaoxianmi.cn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xiaoxianmi.cn\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xiaoxianmi.cn\/en\/wp-json\/wp\/v2\/comments?post=5022"}],"version-history":[{"count":1,"href":"https:\/\/www.xiaoxianmi.cn\/en\/wp-json\/wp\/v2\/posts\/5022\/revisions"}],"predecessor-version":[{"id":7458,"href":"https:\/\/www.xiaoxianmi.cn\/en\/wp-json\/wp\/v2\/posts\/5022\/revisions\/7458"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.xiaoxianmi.cn\/en\/wp-json\/wp\/v2\/media\/5023"}],"wp:attachment":[{"href":"https:\/\/www.xiaoxianmi.cn\/en\/wp-json\/wp\/v2\/media?parent=5022"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xiaoxianmi.cn\/en\/wp-json\/wp\/v2\/categories?post=5022"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xiaoxianmi.cn\/en\/wp-json\/wp\/v2\/tags?post=5022"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}} | | | | | | |
![\"\u9694\u819c\u538b\u6ee4\u673a\u6ee4\u5e03\u9009\u578b-\u677f\u6846\u53a2\u5f0f\u9694\u819c\u538b\u6ee4\u673a\"](\"https:\/\/www.xiaoxianmi.cn\/wp-content\/uploads\/2022\/06\/2022060222223488.webp\" "\\"\u9694\u819c\u538b\u6ee4\u673a\u6ee4\u5e03\u9009\u578b-\u677f\u6846\u53a2\u5f0f\u9694\u819c\u538b\u6ee4\u673a\\"")
<\/p>\n