heat flow中文翻譯，heat flow是什么意思，heat flow發(fā)音、用法及例句
- 內(nèi)容導(dǎo)航：
- 1、heat flow
- 2、跪求一篇有關(guān)加熱爐的外文、有翻譯就更好了?。。?/a>
1、heat flow
heat flow發(fā)音
英： 美：
heat flow中文意思翻譯
常用釋義：熱流：熱量從一個(gè)物體或系統(tǒng)向另一個(gè)物體或系統(tǒng)傳遞的過(guò)程。
熱流，熱流動(dòng)
[熱]熱流；[熱]熱流動(dòng)
heat flow雙語(yǔ)使用場(chǎng)景
1、The rate of heat flow between any two points increases with difference of temperature.───任何兩點(diǎn)間的熱流動(dòng)速率則隨溫差的加大而增加.
2、Basin basement palaeo - heat flow is a basic boundary parameter condition to realize basin geothermal field simulation.───盆地基底古熱流是實(shí)現(xiàn)盆地地?zé)釄?chǎng)模擬的基礎(chǔ)邊界參數(shù)條件.
3、The approximation of a linear dependency between heat flow and temperature difference leads to satisfactory results.───在熱流量與溫度差之間,近似地采用線性關(guān)系,也能得出令人滿意的結(jié)果.
4、The friction heat flow density of single tooth affects temperature distribution of the gear body most.───單輪齒摩擦熱流密度對(duì)斜齒輪本體溫度分布梯度影響較大.
5、In heterogeneous anisotropic materials the heat flow vector and conductivity are more complex.───在各向異性的非均質(zhì)材料中,熱流向量和熱導(dǎo)率很復(fù)雜.
6、Then the law of heat flow and the distribution of the heat loss are estimated.───并可估算出熱流規(guī)律和熱損失的分配.
7、Practical applications for heat flow measurements in ocean floors are the location of hot brines.───洋底熱流量測(cè)量的實(shí)際目的是圈定熱鹵水的位置.
8、Our result shows the nonuniform distribution of mantle heat flow in China.───結(jié)果顯示,中國(guó)大陸地幔熱流的空間分布不均勻.
9、Steady - state heat flow is comparable to the flow of an incompressible fluid.───穩(wěn)態(tài)熱流和不可壓縮流體的流動(dòng)可相比擬.
10、Others are small enough that they can only be detected by sophisticated heat - flow measuring instruments.───其他一些非常小的地慢羽只能通過(guò)精密復(fù)雜的熱流測(cè)量?jī)x器來(lái)探測(cè).
11、Heat flow meter is an important instrument for saving energy.───熱流計(jì)是一種重要的節(jié)能用儀表。
12、Let's say there's no heat flow.───讓我們假設(shè)沒(méi)有熱量流動(dòng)。
13、property that changes, depending on the heat flow.───性質(zhì)，隨熱量的流動(dòng)變化。
14、The geographical distribution of heat flow data is very uneven.───熱流量資料的地理分布很不平衡.
heat flow相似詞語(yǔ)短語(yǔ)
1、heat loss───[熱]熱損失，熱損耗
2、gas flow───[流]氣流；氣流量
3、peak flow───洪峰；最大流量
4、heavy blow───強(qiáng)力的打擊
5、heat flux───[熱]熱流，[熱]熱通量
6、healthy glow───健康發(fā)光
7、wheat flour───[糧食]小麥粉
8、gene flow───[遺]基因流，[遺]基因流動(dòng)；基因憐
9、heathfowl───石楠
2、跪求一篇有關(guān)加熱爐的外文、有翻譯就更好了?。?！
加熱爐的工作原理與主要技術(shù)參數(shù)
一、加熱爐工作原理
液體（氣體）燃料在加熱爐輻射室（爐膛）中燃燒，產(chǎn)生高溫?zé)煔獠⒁运鳛闊彷d體，流向?qū)α魇?，從煙囪排出。待加熱的原油首先進(jìn)入加熱爐對(duì)流室爐管，原油溫度一般為29。爐管主要以對(duì)流方式從流過(guò)對(duì)流室的煙氣（9）中獲得熱量，這些熱量又以傳熱方式由爐管外表面?zhèn)鲗?dǎo)到爐管內(nèi)表面，同時(shí)又以對(duì)流方式傳遞給管內(nèi)流動(dòng)的原油。原油由對(duì)流室爐管進(jìn)入輻射室爐管，在輻射室內(nèi)，燃燒器噴出的火焰主要以輻射方式將熱量的一部分輻射到爐管外表面，另一部分輻射到敷設(shè)爐管的爐墻上，爐墻再次以輻射方式將熱輻射到背火面一側(cè)的爐管外表面上。這兩部分輻射熱共同作用，使?fàn)t管外表面升溫并與管壁內(nèi)表面形成了溫差，熱以傳導(dǎo)方式流向管內(nèi)壁，管內(nèi)流動(dòng)的原油又以對(duì)流方式不斷從管內(nèi)壁獲得熱量，實(shí)現(xiàn)了加熱原油的工藝要求。
加熱爐加熱能力的大小取決于火焰的強(qiáng)弱程度（爐膛溫度）、爐管表面積和總傳熱系數(shù)的大小。火焰愈強(qiáng)，則爐膛溫度愈高，爐膛與油流之間的溫差越大，傳熱量越大；火焰與煙氣接觸的爐管面積越大，則傳熱量越多；爐管的導(dǎo)熱性能越好，爐膛結(jié)構(gòu)越合理，傳熱量也愈多。火焰的強(qiáng)弱可用控制火嘴的方法調(diào)節(jié)。但對(duì)一定結(jié)構(gòu)的爐子來(lái)說(shuō)，在正常操作條件下爐膛溫度達(dá)到某一值后就不再上升。爐管表面的總傳熱系數(shù)對(duì)一臺(tái)爐子來(lái)說(shuō)是一定的，所以每臺(tái)爐子的加熱能力有一定的范圍。在實(shí)際使用中，火焰燃燒不好和爐管結(jié)焦等都會(huì)影響加熱爐的加熱能力，所以要注意控制燃燒器使之完全燃燒，并要防止局部爐管溫度過(guò)高而結(jié)焦。
二、加熱爐的運(yùn)行參數(shù)
爐膛溫度（擋墻溫度）
爐膛溫度一般指煙氣離開輻射室的溫度，也就是煙氣未進(jìn)入對(duì)流室的溫度或輻射室擋火
墻前的溫度，是加熱爐運(yùn)行的重要參數(shù)。在爐膛內(nèi)（輻射室）燃料燃燒產(chǎn)生的熱量，是通過(guò)輻射和對(duì)流傳給爐管的。傳熱量的大小與爐膛溫度和管壁溫度有關(guān)。原油從加熱爐中獲得的熱量其中有以輻射傳熱為主。輻射換熱與火焰的絕對(duì)溫度的四次方成正比，因此，在高溫區(qū)中，輻射受熱面的吸熱效果要比對(duì)流受熱面的效果好，吸收同樣數(shù)量的熱量，輻射換熱所需的受熱面積即金屬消耗量要比對(duì)流換熱的少。設(shè)計(jì)時(shí)選取的爐膛溫度值決定著加熱爐輻射受熱面及對(duì)流受熱面之間的吸熱量比例。爐膛溫度高，輻射室傳熱量就大，所以爐膛溫度能比較靈敏地反映爐出口溫度。但是從運(yùn)行角度考慮，爐膛溫度過(guò)高，輻射室爐管熱強(qiáng)度過(guò)大，有可能導(dǎo)致輻射管局部過(guò)熱結(jié)焦同時(shí)進(jìn)入對(duì)流室的煙氣溫度也過(guò)高，對(duì)流室爐管也易被燒壞，使排煙溫度過(guò)高，加熱爐熱效率下降。所以爐膛溫度是保證加熱爐長(zhǎng)期安全運(yùn)行的指標(biāo)。在輸油加熱爐中爐膛溫度最高不超過(guò)&。
排煙溫度
排煙溫度是煙氣離開加熱爐最后一組對(duì)流受熱面進(jìn)入煙囪的溫度。排煙溫度不應(yīng)過(guò)高，否則熱損失大。在操作時(shí)應(yīng)控制排煙溫度，在保證加熱爐處于負(fù)壓完全燃燒的情況下，應(yīng)降低排煙溫度。排煙溫度的調(diào)節(jié)一般用控制進(jìn)風(fēng)量，即調(diào)整過(guò)?？諝庀禂?shù)的辦法。降低排煙溫度，可減少加熱爐排煙熱損失，提高熱效率，從而節(jié)約燃料消耗量，降低加熱爐運(yùn)行成本。但排煙溫度過(guò)低，使對(duì)流受熱面末段煙氣與載熱質(zhì)的傳熱溫差降低，增加了受熱面的金屬消耗量，提高加熱爐的投資費(fèi)用。因此，排煙溫度的選擇要經(jīng)過(guò)經(jīng)濟(jì)比較。
在選擇最合理的排煙溫度時(shí)，還應(yīng)考慮低溫腐蝕的影響。由于燃料中的硫在燃燒后可生成+，它在煙氣中和水蒸氣形成硫酸蒸氣，當(dāng)受熱面壁溫低于硫酸蒸氣的露點(diǎn)溫度時(shí)，硫酸蒸氣就會(huì)冷凝下來(lái)，腐蝕壁面金屬。如受熱面壁溫低于煙氣中水蒸氣的露點(diǎn)時(shí)，則水蒸氣也會(huì)凝結(jié)在管壁上，加劇了腐蝕，并且容易引起堵灰。降低露點(diǎn)，減少腐蝕和積灰的措施有：凈化燃料油。目前國(guó)外已有應(yīng)用，但能否廣泛應(yīng)用還值得研究。
Heating furnace operation principle and main technical parameters
A, heating furnace work principle
Liquid (gas) fuel heating furnace chamber (in) radiation temperature flue gas and burn, produce it as a heat carrier, flow convection chamber, from the chimney emitted. Stay heating oil first into the furnace convection chamber furnace tube, crude oil temperature general for 29. The furnace pipe flows by convection means mainly from the flue gas convection chamber (9), these heat gain heat and heat transfer surface conducting by outside the furnace pipe to furnace tube surface, the same time again with convection means the transfer to the flow inside the canal crude oil. Crude oil by convection chamber furnace tube into the radiation room furnace tube, in radiation indoor, burner outbursts of flame mainly radiation pattern will heat radiation to part of the furnace pipe outside surface, the other part of radiation to laying the furnace pipe furnace wall, oven walls once again in radiation pattern will radiation back on one side of the furnace pipe fire surface appearance surface. The two parts together heat effect, make the furnace pipe with wall surface temperature and the temperature inside the surface formed by conduction modes, heat flow pipe wall, the oil and the flow inside the canal with convection means constantly from tube wall get heat, realized the heated crude oil process requirement.
The size of the heating furnace heating ability depends on the strength of the flame of furnace temperature level (), furnace tube surface area and the size of the total heat transfer coefficient. Flame furnace temperature, the better the higher temperature between the chamber and overflows, the greater the greater the heat; Flame and smoke contact the furnace pipe area, the more the heat; Furnace tube heat conduction performance better, more reasonable, preaching chamber structure more calories. The strength of the fire control of fire the mouth the method can adjust. But for certain structure for the stove, in normal operation condition of furnace temperature up to a certain value rise after will no longer. The furnace pipe the total heat transfer coefficient of surface of a stove, so it is certain the heating ability per stove has certain scope. In actual use, the flame is bad and furnace tube coked etc will affect the reheating furnace heating ability, so attention should be paid to control the burner to complete combustion, and to prevent local furnace tube temperature exorbitant and coked.
Second, heating furnace operation parameters
Retaining wall temperature of furnace temperature ()
Generally refers to a flue gas furnace temperature, the temperature from radiation chamber is not enter convection chamber of flue gas temperature or radiation room block fire
Wall temperature, is the important parameters of heating furnace operation. The chamber of a stove or furnace (radiation room) fuel combustion heat generation, it is through radiation and convection to furnace tube. The size of the heat pipe furnace temperature and the temperature with relevant. Oil obtained from heating furnace with radiation heat transfer heat one to give priority to. Radiation heat transfer and the absolute temperature of flame four times, therefore, is proportional to the square in the drier, radiation heating effect of heating collector than convection the effect is good, absorb the same amount of heat, radiant heat the heated area namely metals needed than the convective heat consumption, the less. When the design selection of hearth furnace temperature decides the heating heating radiation and the heat convection between ratio. High temperature in the furnace, radiation room is big, so the heat of furnace temperature can compare to reflect the furnace exit temperature sensitive. But from running Angle consideration, of furnace temperature is exorbitant, radiation room furnace tube heat intensity, may cause excessive radiation tube local overheating coked also into the flue gas temperature is convection chamber exorbitant, convection chamber furnace tube also easy to be burnt out, make smoke temperature is exorbitant, reheating furnace thermal efficiency drops. So is the guarantee of furnace temperature of heating furnace and long-term safety operation index. In oil heating furnace chamber temperature is highest do not exceed &.
Exhaust temperature
Exhaust temperature is the smoke from the last group of convection heating furnace temperature into the chimney. Exhaust temperature should not exorbitant, otherwise the heat loss. During operation should be controlled in ensuring the exhaust temperature, heating in negative pressure under the condition of complete combustion, should reduce exhaust temperature. Exhaust temperature regulation general use control volume, namely adjustment in excess air coefficient method. Reduce exhaust temperature, can reduce reheating furnace smoke heat loss, improve thermal efficiency, thus saving fuel consumption, lower heating furnace operation cost. But exhaust temperature too low, make convection heat heating with terminal flue gas temperature is reduced, the heat transfer increased consumption and raise the metal heating furnace cost. Therefore, exhaust temperature choice should pass economic comparison.
In selecting the most reasonable exhaust temperature, still should consider the influence of corrosion at low temperature. Because of the sulfur in burning fuel, it can generate + in flue gas and water vapor form sulfuric steam, when heated side wall temperature below the dew point temperature sulfuric acid steam condensation, sulfuric acid steam will come down, the corrosion wall metal. Heated side wall temperature below the dew point in smoke when water vapor, the vapor will also condensed in wall, increased the corrosion, and easy to attract plugging ash. Reduce dew point corrosion and sulphuric acid, reduce the measures are: purification fuel oil. At present foreign applications, but can have wide application still is worth studying.
本站其他內(nèi)容推薦
1、pirate economist nightspot malty hempen eta Titan torticollis mitigant progeria
2、獻(xiàn)血后注意事項(xiàng)及禁忌吃什么，獻(xiàn)血后要注意哪些問(wèn)題？
3、笑傲風(fēng)月的意思，笑傲風(fēng)月成語(yǔ)解釋，笑傲風(fēng)月是什么意思含義寓意
4、風(fēng)吹日曬的意思，風(fēng)吹日曬成語(yǔ)解釋，風(fēng)吹日曬是什么意思含義寓意
6、形容精彩的成語(yǔ)，形容非常精彩的成語(yǔ)，四字成語(yǔ)，四字詞語(yǔ)
8、bologna是什么意思，bologna中文翻譯，bologna怎么讀、發(fā)音、用法及例句
9、notopodium是什么意思，notopodium中文翻譯，notopodium怎么讀、發(fā)音、用法及例句
10、shared
11、meshugge
版權(quán)聲明: 本站僅提供信息存儲(chǔ)空間服務(wù)，旨在傳遞更多信息，不擁有所有權(quán)，不承擔(dān)相關(guān)法律責(zé)任，不代表本網(wǎng)贊同其觀點(diǎn)和對(duì)其真實(shí)性負(fù)責(zé)。如因作品內(nèi)容、版權(quán)和其它問(wèn)題需要同本網(wǎng)聯(lián)系的，請(qǐng)發(fā)送郵件至 舉報(bào)，一經(jīng)查實(shí)，本站將立刻刪除。
