外文翻譯(中英文)懸浮預(yù)熱技術(shù)

1、<p><b>　　中文4064字</b></p><p>　　suspended preheatingtechnique</p><p>　　A, suspended preheatingtechnique superiority </p><p>　　Traditional dry process rotary kiln prod

2、uction of raw cement clinker, burn, decomposed and preheat the plume are completed in the process. Rotary kiln as burning into equipment, because it can provide section temperature distribution was homogeneous temperatur

3、e field, and can ensure material at high temperatures have enough retention time, still can meet the requirements. But as heat and mass transfer equipment is not ideal, to need to heat larger preheating, decomposing proc

4、ess is very not adap</p><p>　　Second, the characteristics of suspension preheater kiln </p><p>　　Suspension preheater kiln characteristic is in after a short length of rotary kiln installed susp

5、ension preheater, make originally in the states with accumulation plume material preheating and part of carbonate decomposing process, moved to suspension preheater through suspension state within a state of suspension,

6、so the raw with heat flow powder, fully contact with the gas and solid phase interface big, heat transfer speed, high efficiency, improve the kiln production ability, reduce the heat </p><p>　　Three, suspens

7、ion preheater the composition and function </p><p>　　Suspension preheater mainly cyclone preheater and made tube preheater two kinds. Tube preheater has now made tends to eliminated. Pre by cyclone preheater

8、 decompose kiln as preheating unit equipment. Constitute a cyclone preheater heat transfer unit equipment is mainly a whirlwind tube and tube at various levels between whirlwind of connecting pipeline (also called heat p

9、ipe). The main function of suspension preheater is fully utilize rotary kiln and the drain of decomposing furnace hot airflow </p><p>　　Four, the influence of thermal efficiency and the dedusting efficiency

10、factors </p><p>　　1, leak air of influence </p><p>　　Whirlwind tube as cement suspension preheater decomposition process important equipment, its air leakage, whether in the air leakage or air l

11、eakage, is harmful. Preheat system directly affects its outside air leakage and increase efficiency, exhaust fan power consumption, and feed tube place in air leakage makes whirlwind canister separation efficiency sharpl

12、y reduced the fly ash, system, causing an indirect influence ratio increases the preheater system thermal efficiency. In the actual product</p><p>　　2, the influence of whirlwind tube import wind speed </

13、p><p>　　Different wind conditions, with imported whirlwind tube import wind speed increase, next makings pipe leakage caused a whirlwind tube in reduction of separation efficiency increase, if keep constant, th

14、e air leakage of air leakage caused by imported wind speed reduction and separation efficiency whirlwind canister less effect. </p><p>　　3 and solid gas ratio influence </p><p>　　Solid/gas ratio

15、 under different in feed tube and air leakage caused a whirlwind canister reduction separation efficiency is different also with solid/gas ratio increases, down feed tube leakage caused a whirlwind tube in reduction of s

16、eparation efficiency increases at the same time. But, for a given leakage rate, with solid/gas ratio increases, the difference in value and separation efficiency gradually narrowing. The greater the solid/gas ratio, feed

17、 tube place air leakage caused a whirlwind tu</p><p>　　4, a whirlwind canister influence of the structure of 2 </p><p>　　Whirlwind cylinder is generally rectangles 2 structure, a new type of low

18、-pressure loss due to the structure type whirlwind tube changes and geometrical shape of 2 also change, some use five-sides, some use diamond, aims to guide into a whirlwind of mono under gas-solid flow deflection moveme

19、nt, reduce a whirlwind canister resistance. Whirlwind tube import way generally has two kinds, namely import airflow tillu tangent says straight with cylinder type; Airflow around the tangent says with spira</p>&

20、lt;p>　　5, tube insertion depth </p><p>　　The increase of steel-flue insert depth, the resistance coefficient and separation efficiency is the increase of different processes. Insert depth, and imported hi

21、gh tube ratio of s/a = o. 482-0.612 range, low resistance coefficient little change, and separation efficiency increases slightly, so sure of separation efficiency should be emphasized the intermediate level resistance r

22、eduction whirlwind cylinder should be in s/a 0.612 or so, and had better not & lt; Separation efficiency 0.482 (too m</p><p>　　6 and the influence of tube diameter </p><p>　　With the expansi

23、on of inner cylinder diameters, the resistance coefficient and separation efficiency of different diameter reduced, including D< d/a cylinder; 2/3, drag coefficient falling fast, when d/D> 2/3, drag coefficient red

24、ucing slowly. For separation efficiency, it D< tube diameter d /; O. when high separation efficiency and six little change, when d/D> O. 6, separating efficiency decreases rapidly. So guarantee of separation effici

25、ency should be emphasized the intermediate level resista</p><p>　　7, a whirlwind tube high aspect ratio </p><p>　　Along with the increase of whirlwind canister height, the resistance coefficient

26、 and separation efficiency of different reduce respectively, it especially with increase in when a whirlwind tube diameter ratio H/high D< The performance 2.282 more apparent, but when H/D> 2.282, drag coefficient

27、and separation efficiency as a whirlwind canister height respectively increased decreases and increased slowly. So consider the height and preheater tower under the premise of an investment cost, best can g</p>&l

28、t;p>　　Five, the normal production inspection and maintenance of mainly include the following aspects: </p><p>　　(1) a normal production process of the electric dust removal valve condition; </p>&l

29、t;p>　　(2) system seal condition; </p><p>　　(3) decomposition furnace, a whirlwind tube and connecting pipe shell without exception (such as: the night observing shell domestic village peel off and then re

30、d); </p><p>　　(4) the whirlwind tube blow plugging device might be flexible motion (electromagnetic valve), blow plugging pneumatic meets the standards; </p><p>　　(5) artificially block clearer

31、tools are ready; </p><p>　　(6) system temperature sensor, pressure measuring device is stable and reliable; </p><p>　　(7) decomposition furnace burner without exception combustion; </p>&

32、lt;p>　　(8) system safety protective measures for completeness. </p><p>　　Six, stop kiln maintenance preheater and decomposition furnace examination </p><p>　　(1) check cyclone furnace tube an

33、d decomposition without off brick or the eyewinker, inner cylinder are in good condition; Horizontal line without off brick, "inside," feeding material should be clear in time too; Rising pipe; without off bric

34、k Guide plate, and materials plate is in good condition. </p><p>　　(2) check the electric dust removal valve bearing, when necessary, lubricates the clean and refueling; Check the electric dust removal valve

35、 surface is in good condition, if appear valve face severe worn or serious deformation, should promptly replaced. </p><p>　　(3) to examine decomposition furnace burner is in good condition, such as the disco

36、very of a badly worn or deformation should be replaced. </p><p>　　(4) check mouth, preheater shrinkage and discharge smoke room without crust tongue phenomenon, such as a crust should be timely clearing. <

37、;/p><p>　　(5) system maintenance overhaul after each part of the system should be unblocked, and presence of foreign body, the electric dust removal valve activities is flexible, after the check should shut dow

38、n all observations hole and into the hole of the door, completes the system sealing job. </p><p><b>　　懸浮預(yù)熱技術(shù)</b></p><p>　　一、懸浮預(yù)熱技術(shù)的優(yōu)越性傳統(tǒng)干法回轉(zhuǎn)窯生產(chǎn)水泥熟料，生料的預(yù)熱、分解和燒成過程均在窯內(nèi)完成。回轉(zhuǎn)窯作為燒成設(shè)備，由于它

39、能夠提供斷面溫度分布比較均勻的溫度場(chǎng)，并能保證物料在高溫下有足夠的停留時(shí)間，尚能滿足要求。但作為傳熱、傳質(zhì)設(shè)備則不理想，對(duì)需要熱量較大的預(yù)熱、分解過程則甚不適應(yīng)。這主要由于窯內(nèi)物料堆積在窯的底部，氣流從料層表面流過，氣流與物料的接觸面積小，傳熱效率低所致。同時(shí)，窯內(nèi)分解帶料粉處于層狀堆積態(tài)，料層內(nèi)部分解出的二氧化碳向氣流擴(kuò)散的面積小、阻力大、速度慢，并且料層內(nèi)部顆粒被二氧化碳?xì)饽ぐ?，二氧化碳分壓大，分解溫度要求高，這就增大了碳酸鹽分解

40、的困難，降低了分解速度。懸浮預(yù)熱技術(shù)的突破，從根本上改變了物料預(yù)熱過程的傳熱狀態(tài)，將窯內(nèi)物料堆積態(tài)的預(yù)熱和分解過程，分別移到懸浮預(yù)熱器和分解爐內(nèi)在懸浮狀態(tài)下進(jìn)行。由于物料懸浮在熱氣流中，與氣流的接觸面積大幅度增加，因此傳熱速度極快，傳熱效率很高。同時(shí)，生料粉與燃料在懸浮態(tài)下，均勻混合，燃料燃燒熱及時(shí)傳給物料，使之迅速分解。因此，由于傳熱、傳質(zhì)迅速，大幅度提高了生產(chǎn)效率和熱效率。二、懸浮預(yù)熱窯的特點(diǎn)懸浮預(yù)熱窯的特點(diǎn)是在長度較短的回轉(zhuǎn)窯