外文翻譯---中國(guó)選煤廠的設(shè)計(jì)現(xiàn)狀(編輯修改稿)
2025-06-26 10:58 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 paration is the main feature of plant design and which Pingshuo Coal a coal preparation with capacity up to 85Mt/a. Scale of plant construction for coking coal also enlarges conpared with last which Huozhou Coalamp。 a preparation plant with capacity of 15Mt/a. More new plants of large (3Mt/a)and supperlarge (10Mt/a)scale had been designed and jialing Coal Preparation Plant is the largest one for steam coal， having a capacity of 40Mt/a； while Linhuan Coal Preparation P1ant of Large throughput equipment provides favorable condition for construction of largescale plant Follows are the largest equipment successfully employed： width HM separation bath,Φl500mm twoproduct HM cyclone， Φl400/1050mm threeproduct HM cyclone， 4m2 movingsieve jig， 6m width airpulsation jig， 16m3 flotation machine， Φ6m single flotation cell， flotation column， 36m2 flotation bed， Φlm spiral separator， width banana and horizontal vibration screen， 50m slant vibratlon hyperbaric horizontal vibrating conventional press filtar， 300m2 press filter with quickdischarge system， Φ50m to Drewboy and vertical—wheel HM separatilon bath， they are dificult to enlarge due to their construction. ―Accuracy‖refers to cleaning method， separation process and process contro1. Conventional jigging process is gradually replaced by the widely employed HM one due to its accurate flotation gradually replaced by microbubble has been paid to cleaning of 1～ coarse slime， its tendency turns to employ gravitation method for reduction of flotation feed and over all production recent decade， no new application example was seen of such low efficient process as coal slime jigging， tabling， spiral drum and hydrocyclone. Sharpness of separation and classification equipment is ever more increased，including HM separator and cyclone； even conventional jigging machine has its separation sharpness attentions have been paid to improve the efficieny of fine coal separation and classification. ccurate process contro1 turns to be an important link of coal preparation plant control ， monl grand automatic regulation are bined only the process equipment but also the valves and pumps are involved in control system； conveying equipment are multiprotected； and thus， the level of plant automation evidently upgraded and labor productivity increased. ―Simplicity‖refers to technical process， equipment arrangement and production operation. Threeproduct HM cyclone system are widely used in China in view of its feature of HM cyclone on unclassified and undeslimed feed is its ， HM separation of slime and movingsieve jig have been developed in virtue of their simplicity. Equipment of large throughput leads to simple arrangement in plant of abrasion resistant materials increases service life and reliability of equipment， and standby equipment can be coal preparation plant of capacity below 2Mt/a and that for steam coal， below 4Mt/a， can be realized by single set of equipment， and， thence， process system more simple and operation more easy. Coal preparation design in China goes through from simplicity in 1960s to plexity and back to highquality simplicity at present. ―Adoptability‖refers to new equipment， reliable control， abrasion resistant materials， concise process and equipment arrangement， and plant structure. That practical usage， suitability and good for operation are the main evaluation criteria of a plant design has been quietly present， plant design and construction are nearly standardized ： HM process mostly employed and key equipment largely for various Chinese coal resources and meeting different market requirement， more importance is to ―cut the garment according to one’s figure’and―suit measures to local conditions‖.In cleaning process has its own application view of present level of machine fabrication in China， all largescale or super largescale coal preparation plants could be equipped by domestically made machines without equipment for second stage construction of Anjialing Coal Preparation P1ant are more less than that in first stage. Recen
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