【法蘭式液位變送器】熱電廢氣處理設計煙氣分析工控保養(yǎng)須知

    我國熱電工控廢氣處理得到迅速發(fā)展.到2009年底,全國供熱機組總容量達14464萬kW,占火電總裝機容量約20%,占全國發(fā)電機組總容量的17%左右.熱電工控廢氣處理產機組承擔了城市熱水采暖供熱量約30%,城市工業(yè)用汽約83%.在城市集中供熱的總面積中,有三分之一是由熱電廠供熱的

    .熱電工控廢氣處理產對促進國家經濟和社會發(fā)展起到了重要的作用.熱電聯(lián)產要求將熱電站同有關工廠和城鎮(zhèn)住宅集中布局在一定地段內，以取得最大的能源利用經濟效益。造紙、鋼鐵和化學工業(yè)是熱電聯(lián)產的主要用戶，它們不僅是消耗電熱的大用戶，而且其生產過程中所排出的廢料和廢氣可作為熱電聯(lián)產裝置的燃料。

    在熱電生產過程中時常需要不斷的分析進出風口以及廢氣的排放特征，煙氣分析儀日常維護保養(yǎng)計劃之--例行檢查。

【法蘭式液位變送器】熱電廢氣處理設計煙氣分析工控保養(yǎng)須知每次使用煙氣分析儀都要對儀器進行檢查，檢查事項有：
Each time the flue gas analyzer is used, the instrument shall be checked. The inspection items include:
1、開機前，檢查電纜和氣管連接是否正常，有無破損或松落。(注意：需要在MD3干燥器冷凝出水口安裝排水管，以免冷凝物腐蝕儀器)。
1. Before starting the machine, check whether the cable and air pipe are connected normally and whether they are damaged or loose. (Note: drain pipe should be installed at the condensate outlet of MD3 dryer to prevent condensate from corroding the instrument).
2、開機后，檢查氣路是否暢通，排查冷凝物是否堵住排水管。
2. After startup, check whether the air path is unblocked and check whether the condensate blocks the drain pipe.
3、開機后檢查儀器的氣密性，確保煙氣不會在氣路中泄漏。(檢查儀器的氣密性，可以堵住進氣口，若儀器的采樣流量示值在2min內降至零，表明氣密性合格。)
3. Check the air tightness of the instrument after startup to ensure that the flue gas will not leak in the gas path. (to check the air tightness of the instrument, the air inlet can be blocked. If the sampling flow of the instrument drops to zero within 2min, the air tightness is qualified. )
4、開機預熱后，用手接觸MD3干燥器上端，感受MD3內置冷卻器是否制冷，或者待儀器正常運行后觀察MD3藍色指示燈是否正常閃爍。
4. After preheating, touch the upper end of the MD3 dryer by hand to feel whether the MD3 built-in cooler is cooled, or observe whether the blue indicator light of MD3 flickers normally after the normal operation of the instrument.
5、開機預熱后，觀察MD3蠕動泵是否轉動，是否正常排水。
5. After preheating, observe whether the MD3 peristaltic pump rotates and whether the drainage is normal.
6、開機預熱后，觀察儀器主機上的顯示屏讀數(shù)是否正常，儀器內部泵及風扇是否轉動。
6. After the machine is turned on and warmed up, observe whether the display screen reading on the instrument host is normal, and whether the internal pump and fan of the instrument rotate.
7、如果儀器配有加熱管，需檢查加熱系統(tǒng)是否正常工作。
7. If the instrument is equipped with heating tube, check whether the heating system works normally.
8、對于便攜式煙氣分析儀，每次測量完畢關機之前，按照煙氣分析儀說明書上的要求通入清潔的環(huán)境空氣沖洗儀器。
8. For portable flue gas analyzer, clean ambient air shall be introduced to flush the instrument before shutdown after each measurement.
法蘭式液位計也叫插入式法蘭式液位變送器，壓力變送器與被測設備之間用毛細管連接即成為單法蘭遠傳壓力變送器，是一種通過安裝在管道或容器上的遠傳裝置來感受被測壓力，該壓力經毛細管內的灌充硅油（或其它的液體）傳遞至變送器的主體，然后由變送器主體內的δ室和放大線路板，將壓力或差壓轉換4～20mA.DC信號輸出，與符合HART協(xié)議的手操器配合,可以相互通訊，進行設定和監(jiān)控。
Flange type liquid level gauge is also known as plug-in flange type liquid level transmitter. The pressure transmitter is connected with the measured equipment by capillary tube, which is a kind of remote transmission device installed on the pipeline or container to feel the measured pressure. The pressure is transmitted to the main body of the transmitter through the silicone oil (or other liquid) filled in the capillary tube, and then the transmitter The δ chamber and amplifying circuit board in the main body can convert the pressure or differential pressure from 4 to 20 mA.DC Signal output, with HART Protocol in line with the manual operator, can communicate with each other, set and monitor.
【法蘭式液位變送器】熱電廢氣處理設計煙氣分析工控保養(yǎng)須知應用介質：
Application medium:
1、高溫下粘稠介質；
. Viscous medium at high temperature;
2、易結晶的介質；
. Medium easy to crystallize;
3、帶有固體顆?；驊腋∥锏某恋硇越橘|；
. Precipitation medium with solid particles or suspended solids;
4、強腐蝕或劇毒性介質；
. Strong corrosive or highly toxic medium;
5、可消除導壓管泄漏污染周圍環(huán)境現(xiàn)象的發(fā)生；可免去采用隔離液時，因測量信號的不穩(wěn)定，需要經常補充隔離液的繁瑣工作；
. It can eliminate the phenomenon that the leakage of the pressure pipe pollutes the surrounding environment, and can avoid the tedious work of adding the isolation fluid frequently due to the instability of the measurement signal when using the isolation fluid;
6、連續(xù)精確測量界面和密度；
. Continuous and accurate measurement of interface and density;
7、遠傳裝置可避免不同瞬間介質的交混，從而使測量結果真實地反映過程變化的實際情況；
7. The remote transmission device can avoid the mixing of different instantaneous media, so that the measurement results can truly reflect the actual situation of process change;
8、衛(wèi)生清潔要求很高的場合；
. Occasions with high requirements for sanitation and cleanliness;
9、如食品、飲料和醫(yī)藥工業(yè)生產中，不僅要求變送器接觸介質部位符合衛(wèi)生標準，并且應便于沖洗，以防止不同批量介質的交叉污染。
. For example, in the production of food, beverage and pharmaceutical industry, the transmitter should not only meet the hygienic standard, but also be easy to wash to prevent cross contamination of different batches of media.