電蒸汽鍋爐http://m.ydjsh.cn/在設(shè)計時考慮在制造、安裝、檢修和進(jìn)行鍋爐水壓試驗時需排除容器內(nèi)空氣，因此在汽包或飽和蒸汽引出管、各級過熱器、再熱器上聯(lián)箱或連通管均設(shè)計了空氣管。很多時候，鍋爐投入使用后會發(fā)生空氣管泄漏事故，泄漏部位大多為空氣管與管接頭對接焊縫和空氣支管與空氣總管角焊縫。分析泄漏原因為：空氣管路一般為安裝單位根據(jù)現(xiàn)場情況自行排放，各類監(jiān)督檢查不重視，焊口無坡口、對口偏斜、管道開孔為氣割、焊縫夾渣、氣孔、未焊透等缺陷較多，運(yùn)行中由于震動、熱應(yīng)力等原因使內(nèi)在缺陷發(fā)展成泄漏。
Electric steam boilers designed to take in the manufacture, installation, maintenance and boiler pressure test conducted to the exclusion of the air inside the container, so the drum or saturated steam extraction tube, levels superheater, reheater header on or connecting pipe are designed air duct. In many cases, the air duct leakage will occur after the boiler in use, mostly for air pipe leak site and butt weld pipe fittings and manifolds and air duct fillet. Leakage analysis for: air line installation is generally self-discharge unit according to the site, do not pay attention to all kinds of supervision and inspection, no groove weld counterparts deflection, pipe openings for gas cutting, welding slag, porosity, incomplete through many other defects, running due to vibration, thermal stress and other reasons so inherent defects develop into leaks.
電蒸汽鍋爐排污疏水管道屬于安裝單位根據(jù)現(xiàn)場情況自行敷設(shè)，大多數(shù)是沿鍋爐敷設(shè)。此類管道泄漏有以下幾種情況：因管道敷設(shè)焊口背面焊接條件差，焊接缺陷多，從而導(dǎo)致泄漏；管道與閥門對接焊口泄漏較多，原因多為管道未打坡口且對口不同心、偏折、強(qiáng)力對口等；聯(lián)箱管接頭與管道對接焊口或焊止線泄漏，主要因為管道固定在鋼架上，而聯(lián)箱隨爐膨脹，由于鍋爐起停頻繁，導(dǎo)致焊口疲勞；管道因內(nèi)外腐蝕減薄而爆管，主要是內(nèi)部不流動疏水和外部雨水的腐蝕造成。
Electric steam boiler units installed sewage drains are laid according to the situation on their own, mostly along the boiler installation. Such pipeline leak in the following situations: Due to weld pipe laying on the back of poor welding, weld defects, leading to leakage; butt weld pipe and valve leak more and more reasons for not playing the pipe beveling and their counterparts in different heart , deflection, and other powerful counterparts; header pipe fittings and pipe butt weld or solder stop line leakage, mainly because the pipe is fixed on a steel frame, while the expansion header with the furnace, boiler due to start and stop frequently, leading to weld fatigue; inside and outside the pipe due to corrosion thinning and burst pipes, mostly immobile hydrophobic internal and external corrosion caused by rain.
由于電蒸汽鍋爐http://m.ydjsh.cn/主、再熱蒸汽系統(tǒng)、給水系統(tǒng)的溫度套管大多數(shù)為螺紋連接式，投運(yùn)后隨著啟停次數(shù)的增加，管內(nèi)介質(zhì)流動引起振動，會造成因溫度套管螺紋處泄漏而在低谷時焊補(bǔ)或機(jī)組調(diào)停時更換溫度套管，給安全、經(jīng)濟(jì)運(yùn)行帶來一定的威脅。
Because electric steam boilers Lord, temperature reheat steam system, water supply system for threaded bushing majority type, put into operation with the increase in the number of start and stop, causing medium flow tube vibration will cause leaks due to temperature casing thread the replacement of the low temperature of the casing at the time of mediation when welding or crew to safety, the economy has brought a threat.
