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  • GB/T 34238-2017清洁蛋加工流通技术规范Requirement for cleaning eggs in prosess and circulating

    本标准规定了清洁蛋流通技术规范的术语和定义、加工、包装、贮存、运输、销售和可追溯等要求。 <br>本标准适用专营或兼营蛋类批发巿场、超市、配送中心和农贸巿场等销售清洁蛋的场所。 <br>本标准亦适用于清洁蛋电子商务的物流。...

    2022-06-13 15:44:03浏览:7 cleaningrequirementcirculating

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  • GH/T 1024-2000风力清籽机Cottonseed cleaning machine with blower

    本标准规定了风力清籽机的产品分类、技术要求、试验方法、检验规则和标志、包装、运输、贮存。本标准适用于利用风选原理清除棉籽中粗大及细小杂质的棉籽清理机。...

    2022-06-05 17:33:35浏览:5 machinecottoncleaning

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  • ASTM D5703-1995(2013)Standard Practice for Preparatory Surface Cleaning for Clay Brick Masonry

    ASTM D5703-1995(2013)Standard Practice for Preparatory Surface Cleaning for Clay Brick Masonry...

    2022-03-14 21:37:00浏览:13 practicecleaningStandard

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  • 自备热电厂循环水系统清洗预膜及水质稳定性分析

    阐述了自备热电厂循环水系统停车在线剥离、清洗和预膜处理的方法及结果。探讨了循环水系统清洗、预膜的水质控制方法。...

    2020-11-10 09:33:08浏览:19 循环水系统清洗预膜水质稳定性watercirculatingsystemcleaningpre-membranequality

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  • 炼油厂循环水系统化学清洗预膜

    研究了影响炼油厂循环水水质的因素,通过对循环水系统进行化学清洗、预膜,减少了工业污水排放,有利于节约水资源;同时经过水质稳定剂的处理,对管道、设备起到了缓蚀、阻垢的作用,提高了冷换效果,延长了设备的使用寿命....

    2020-11-10 09:33:08浏览:21 循环水化学清洗预膜circulatingwaterchemicalcleaningPre-preparingmembrane

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  • 接煤板的设计与应用

    为了解决带式输送机在输送过程中尾滚筒粘附配合煤的问题,提高系统运行的安全稳定性,自行设计制作了接煤板,该装置能够自动在线清理输送机尾滚筒粘附的配合煤,不损伤胶带,不需另外设置动力,有效解决了生产中运输湿粘煤造成滚筒粘料的问题,可以降低劳动强度,延长胶带使用寿命,降低成本。...

    2020-09-18 16:34:07浏览:18 接煤板带式输送机粘料清洁生产coal-receivingplatebeltconveyorstuckmaterialcleaning

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  • Element geochemistry and cleaning potential of the No. 11 coal seam from Antaibao mining district

    Based on the analyses of sulfur and 41 other elements in 8 channel samples of the No. 11 coal seam from Antaibao surface mine, Shanxi, China and 4 samples from the coal preparation plant of this mine, the distribution of the elements in the seam profile, their geochemical partitioning behavior during the coal cleaning and the genetic relationships between the both are studied. The conclusions are drawn as follows. The coal-forming environment was probably invaded by sea water during the post-stage of peatification, which results in the fact that the contents of As, Fe, S, etc. associated closely with sea water tend to increase toward the top of the seam, and that the kaolinite changes into illite and montmorillonite in the coal-sublayer near the roof. These elements studied are dominantly associated with kaolinite, pyrite, illite, montmorillonite, etc., of which the As, Pb, Mn, Cs, Co, Ni, etc. are mainly associated with sulfides, the Mo, V, Nb, Hf, REEs, Ta etc. mainly with kaolintie, the Mg, Al etc. mainly with epigenetic montmorillonite, and the Rb, Cr, Ba, Cu, K, Hg, etc. mainly with epigenetic illite. The physical coal cleaning is not only effective in the removal of ash and sulfur, but also in reducing the concentration of most major and trace elements. The elements Be, U, Sb, W, Br, Se, P, etc. are largely or partly organically bound showing a relatively low removability, while the removability of the other elements studied is more than 20%, of which the Mg, Mn, Hg, Fe, As, K, Al, Cs, and Cr associated mostly with the coarser or epigenetic minerals show a higher removability than that of ash. The distribution of the elements in the seam profile controls their partitioning behavior to a great degree during the coal cleaning processes....

    2020-06-12 16:18:45浏览:1398 AntaibaominingdistrictNo.11coalseamelementGeochemistrycleaning

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  • Damage and deterioration mechanism and curing technique of concrete structure in main coal cleaning

    Concrete structures in main coal cleaning plants have been rebuilt and reinforced in the coal mines of the Shanghai Da-tun Energy Sources Co. Ltd., the first colliery of the Pingdingshan Coal Co. Ltd. and the Sanhejian mine of the Xuzhou Mining Group Co. Ltd. In these projects, the operating environment and reliability of concrete structures in the main plants of the three companies were investigated and the safety of the structures inspected. Qualitative and quantitative analyses were made on the spe-cial natural, technological and mechanical environments around the structures. On the basis of these analyses, we discuss the long-term, combined actions of the harsh natural (corrosive gases, liquids and solids) and mechanical environments on concrete structures and further investigated the damage and deteriorating mechanisms and curing techniques of concrete structures in the main coal cleaning plants. Our study can provide a theoretical basis for ensuring the reliability of concrete structures in main coal cleaning plants....

    2020-06-12 16:18:00浏览:1396 maincoalcleaningplantsConcretestructureoperatingenvironmentreliability

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  • Cleaning of South African coal using a compound dry cleaning apparatus

    The compound dry cleaning principle is briefly described. A beneficiation test on South African coal was conducted using a model compound dry cleaning apparatus. Excellent results were obtained and the optimum operating parameters were determined. They are: an amplitude of 3.0 ram, a motor frequency of 47.5 Hz, an air volume of 50%, a transverse angle of 7°, and a longitudinal angle of -2°. These conditions yield a clean coal containing 11% ash and a coal production of 75%. The organic efficiency, η, is 95.86%. These results show that the South African coal can be separated effectively by compound dry cleaning, which will popularize the compound dry cleaning method....

    2020-06-12 16:17:56浏览:1388 compounddrycleaningmodelapparatusSouthAfricancoal

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  • Parametric study of electrostatic separation of South African fine coal

    The fact that water requirements are a major problem for present and future developments in material beneficiation, and the construction of a new power plant in South Africa, forms the basis for the utilization of a Rotary Triboelectrostatic Separator (RTS) for beneficiation of South African pulverized coal. The cleaning potential of Majuba and Koorfontein coal was first evaluated using kinetic froth flotation tests on the -177μm coal fraction. The RTS tests were conducted under varied process parameters. Parameters such as applied separating voltage, air injection velocity, particle feed rate and splitter position were investigated. Two stage separation results show that the RTS reduced Majuba coal initially containing about 30% ash to a clean product of 14.30%, or 19.46%, ash at a combustible recovery of 15.10%, or 53.02%, respectively. Similar separation performance was also achieved with the Koorfontein coal. The mineral and organic compositions in the feed, after single stage and after the second stage separations were characterized using X-ray diffraction analysis. The results show a better separation for the second stage coal products....

    2020-06-12 16:17:15浏览:1397 coalcleaningparticlechargingRTStechniqueseparationstage

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  • Combined Removal of Surface Moisture and Dust from Feed Coal for Coal Dry Cleaning with an Air-solid

    A demonstration plant and a commercial plant employing coal dry cleaning technology with an air-solid fluidized bed were built in China. The operation practice of these two plants shows that the surface moisture and the fines or dust of feed coal must be well controlled as low as possible. For this purpose, a new process of combined removal of surface moisture and dust from feed coal using a vibrated fluidized bed dryer was investigated in a batch test apparatus and a pilot test system. A mathematical model on drying kinetics of coal surface moisture was developed and three empirical formulas of the model coefficient involving the main operating variables were determined based on the test results from the batch test apparatus. The mathematical model shows that the surface moisture retained in coal during drying decreases exponentially with drying time. According to this model, a new divisional heat supply mode, in which the inlet gas of higher temperature was introduced into the fore part of the dryer and the inlet gas of lower temperature into the rear part of the dryer, was employed in the pilot test system. The pilot tests show that 1) the new divisional heat supply mode is effective for lowering down the average temperature and reducing the total heat loss of the outlet gas off the dryer, 2) the moist coal of about 60 g/kg surface moisture contentcan be dried to about 10 g/kg, and simultaneously the fines (...

    2020-06-12 16:16:45浏览:1389 coaldrycleaningdryingdustvibratedfluidizedbed

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  • 多喷嘴水煤浆气化重要设备的在线清洗

    分析了多喷嘴水煤浆气化装置在运行中遇到的二级滚筒筛堵塞、废水换热器堵塞和酸性气冷凝器腐蚀内漏的原因,采取了一系列改造措施,实现了锁斗冲洗水换热器、废水换热器和酸性气冷凝器在线冲洗(吹扫)、二级滚筒筛在线清理,在运行中取得了较为理想的效果。...

    2020-06-12 14:39:47浏览:1427 二级滚筒筛堵塞换热器在线清洗two-stagedrumscreenblockingheatexchangeron-linecleaning

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  • 多喷嘴水煤浆气化重要设备的在线清洗

    分析了多喷嘴水煤浆气化装置在运行中遇到的二级滚筒筛堵塞、废水换热器堵塞和酸性气冷凝器腐蚀内漏的原因,采取了一系列改造措施,实现了锁斗冲洗水换热器、废水换热器和酸性气冷凝器在线冲洗(吹扫)、二级滚筒筛在线清理,在运行中取得了较为理想的效果。...

    2020-03-23 18:54:01浏览:1409 二级滚筒筛堵塞换热器在线清洗two-stagedrumscreenblockingheatexchangeron-linecleaning

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  • 聚酯装置乙二醇换热器热清洗方法改进

    探讨某生产线缩聚真空系统乙二醇列管换热器长时间运行造成的小分子和低聚物在管程内壁附着,直接影响换热效果和乙二醇(EG)流通量,从而影响真空系统能力,导致真空运行周期短的问题,摸索解决方案,并进行针对性改造。...

    2020-03-23 18:41:58浏览:1392 聚酯换热器热清洗polyesterheatexchangerthermalcleaning

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