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 æœ‰æœºçƒ­è²ä½“加热炉在我国的使用已经有许多年了,ç”׃ºŽå…‰™«˜æ¸©ä½ŽåŽ‹çš„特点åQŒæ­£ä¸ø™¶Šæ¥è¶Šå¤šçš„行业和领域所采用åQŒæ— è®ºæ˜¯çŸ¿ç‰©åž‹å¯¼çƒ­æÑa˜q˜æ˜¯åˆæˆåž‹å¯¼çƒ­æÑa用户åQŒä¹Ÿæ— è®ºæ˜¯ä‹É用的燃料是煤åQŒç‡ƒæ–™æÑaåQˆæ°”åQ‰æˆ–是电加热åQŒå·¥è‰ºæ¸©åº¦çš„控制始终是用戯‚¾ƒä¸ºå…³å¿ƒçš„问题åQŒå¦‚何达到工艺温度åƈ保持½E›_®š¾_„¡¡®æ˜¯åŠ çƒ­ç‚‰æŽ§åˆ¶çš„一大重炏V€?/span> </p> <p> <span style="font-size:14px;"><strong>一åQŽä‹É用不同燃料的加热炉的温度控制方式</strong></span> </p> <p> <span style="font-size:14px;line-height:1.5;"><b><span style="font-size:14px;">     </span></b><span style="font-size:14px;">1. 燃煤加热ç‚?/span></span> </p> <p> <span style="font-size:14px;line-height:1.5;">     ç…¤çš„燃烧方式有层式燃烧、悬‹¹®ç‡ƒçƒ§ã€æ²¸è…„¡‡ƒçƒ§ã€æ°”化燃烧等åQŒè€Œå±‚式燃烧则是现有热载体加热炉中的主要燃烧方式,其设备有火上æ·È…¤çš„手烧炉排炉åQŒç«å‰æ·»ç…¤çš„链条炉排炉,往复炉排炉½{‰ã€?/span> </p> <p> <span style="font-size:14px;line-height:1.5;">     ç…¤ä»Ž˜q›å…¥ç‚‰è†›åˆ°ç‡ƒçƒ§å®Œæ¯•ï¼Œä¸€èˆ¬ç»åŽ†å››ä¸ªé˜¶ŒDµï¼š</span> </p> <p> <span style="font-size:14px;line-height:1.5;">     æ°´åˆ†è’¸å‘阶段åQšå½“温度辑ֈ°105℃左åÏx—¶åQŒæ°´åˆ†å…¨éƒ¨è¢«è’¸å‘ã€?/span> </p> <p> <span style="font-size:14px;line-height:1.5;">     æŒ¥å‘物着火阶ŒDµï¼šç…¤ä¸æ–­å¸æ”¶çƒ­é‡åŽåQŒæ¸©åº¦ç‘ô¾l­ä¸Šå‡ï¼ŒæŒ¥å‘物随之析出,当温度达到着火点æ—Óž¼ŒæŒ¥å‘物开始燃烧ã€?/span> </p> <p> <span style="font-size:14px;line-height:1.5;">     ç„¦ç¢³ç‡ƒçƒ§é˜¶æ®µåQšç…¤ä¸­çš„挥发物着火燃烧后åQŒä½™ä¸‹çš„¼„›_’Œç°ç»„成的å›ÞZ½“物便是焦¼„Ÿë€‚此时焦¼„Ïx¸©åº¦ä¸Šå‡å¾ˆå¿«ï¼Œå›ºå®š¼„›_‰§çƒˆç‡ƒçƒ§ï¼Œæ”‘Ö‡ºå¤§é‡çš„热量ã€?/span> </p> <p> <span style="font-size:14px;line-height:1.5;">     ç‡ƒçƒ¬é˜¶æ®µåQšè¿™ä¸ªé˜¶ŒDµä‹É灰渣中的焦碳ž®½é‡çƒ§å®ŒåQŒä»¥é™ä½Žä¸å®Œå…¨ç‡ƒçƒ§çƒ­æŸå¤±åQŒæé«˜æ•ˆçŽ‡ã€?/span> </p> <p> <span style="font-size:14px;line-height:1.5;">     ä»Žä»¥ä¸Šç…¤çš„燃烧特性可以看出,煤的燃烧不是åÏx—¶çš„,从煤的进入到煤的发热有一ŒD‰|—¶é—ß_¼Œè€Œä¸”在整个发热过½E‹ä¸­åQŒç…¤çš„燃烧强度也是弱-å¼?å¼Þqš„变化着åQŒè¿™äº›éƒ½ä¸ºç¨³å®šçš„燃烧控制带来了难度ã€?/span> </p> <p> <span style="font-size:14px;line-height:1.5;">   åQ?åQ‰æ‰‹çƒ§å›ºå®šç‚‰æŽ?/span> </p> <p> <span style="font-size:14px;line-height:1.5;">     æ‰‹çƒ§ç‚‰æ˜¯å¤è€ç®€å•çš„一¿Uå±‚燃炉åQŒå®ƒå…ähœ‰¾l“æž„½Ž€å•ï¼ŒåˆåŸºæœ¬ä¸Šèƒ½é€‚应各煤¿Uçš„特点。小型的加热炉,特别是负荷在40万大å?时以下的加热炉有些还采用手烧固定炉排。这¿Uç‚‰æŽ’的温度调节全凭操作人员æ ÒŽ®ç”¨çƒ­è®‘Ö¤‡å·¥è‰ºéœ€è¦åŠé•¿æœŸçš„ä‹É用经验,通过加煤的频率、加煤量和鼓引风机风门开度来适应用热负荷的变化,ç”׃ºŽç…¤çš„加入的间断性和发热强度的变化,供热热媒的温度æ‡L动很大,一般æ‡L动范围äؓûu8℃左叻I¼Œè€Œä¸”燃烧½E›_®šçŠ¶å†µä¹Ÿå¾ˆä¸å¥½åQŒåªèƒ½åœ¨ä¸€äº›å¯¹ç”¨çƒ­æ¸©åº¦½E›_®šæ€§è¦æ±‚不高的场合下ä‹É用ã€?/span> </p> <p> <span style="font-size:14px;">   åQ?åQ?链条炉排</span> </p> <p> <span style="font-size:14px;">     é“¾æ¡ç‚‰æŽ’的煤自煤斗滑落在å†ïL‚‰æŽ’上后,接受炉膛的高温辐ž®„,自上而下地着火、燃烧。显而易见,着火条件不及手烧炉有利åQŒæ˜¯ä¸€¿Uâ€œå•é¢å¼•ç«â€çš„炉子。但因整个燃烧过½E‹çš„几个阶段是沿炉排长度由前臛_ŽåQŒè¿ž¾l­é¡ºåºåœ°å®ŒæˆåQŒæ•…不存在手烧炉的é‚£¿Uå·¥ä½œå‘¨æœŸæ€§ï¼Œä½¿ç‡ƒçƒ§å·¥å†µå¤§ä¸ºæ”¹å–„ã€?/span> </p> <p> <span style="font-size:14px;line-height:1.5;">     å¯¹äºŽä½¿ç”¨é“¾æ¡ç‚‰æŽ’的燃煤加热炉åQŒç‚‰æŽ’上的燃烧出力与送风量、炉排速度和燃料层厚度有关。煤层的厚薄æ ÒŽ®ç”¨ç…¤çš„特性经燃烧调整完成后,除非更换煤种ž®×ƒ¸å†å˜åŠ¨ã€‚送风量的变动对出力的变化影响较äؓ敏锐åQŒæé«˜é£Žé€Ÿä¼šç«‹å³åŠ å¿«ç‡ƒçƒ§ååº”速度åQŒä‹É锅炉出力增加。炉排速度的调节,实际是给煤量的调节。链速过慢,会ä‹É炉排上积储燃料不­‘»I¼Œé™ä½Žå‡ºåŠ›åQŒé“¾é€Ÿå¤ªå¿«ï¼Œå›ºç„¶ä¼šä‹É出力增加åQŒä½†åœ¨å°¾éƒ¨ä¼šå‡ºçŽ°ç‡ƒæ–™ä¸èƒ½å®Œå…¨ç‡ƒå°½è€Œä‹Éå›ÞZ½“未完全燃烧损失加大的情况åQŒç»™ç…¤é‡çš„调节必™åÖM¸Žé€é£Žé‡å¾ˆå¥½é…åˆã€?/span> </p> <p> <span style="font-size:14px;">     å…·ä½“操作æ—Óž¼Œå½“用热负荷增加时åQŒå¼€å¤§é¼“引风机的调节风门åQŒåƈ同时加大炉排调速器的è{速,使炉排的出力增加åQ›å½“用热负荷减少æ—Óž¼Œå…›_°é¼“引风机的调节风门,òq¶åŒæ—‰™™ä½Žç‚‰æŽ’调速器的è{速,使炉排的出力减少åQ›è¿™æ ·ä¿è¯äº†åŠ çƒ­ç‚‰çš„出口热媒温度保持在一定的温度范围内。由于燃煤调节的滞后性,其温度æ‡L动范围äؓûu5℃左叟ë€?/span> </p> <p> <span style="font-size:14px;">     å¦‚æžœ˜q›ä¸€æ­¥é‡‡ç”¨å˜é¢‘器调节风机和无¾U§è°ƒé€Ÿç‚‰æŽ’调速器后,调节温度的精度可以更高,温度的æ‡L动也大äؓ降低了。当出现波动æ—Óž¼Œé¦–å…ˆæ ÒŽ®çƒ­åª’出口温度来变频调节鼓风机和炉排调速器åQŒç„¶åŽæ ¹æ®ç‚‰è†›è´ŸåŽ‹ï¼ˆåQ?~4mm水柱åQ‰æ¥å˜é¢‘调节引风æœø™¾¾åˆ°æ–°çš„åã^衡。通过˜q™æ ·çš„变频调节,热媒出口温度波动范围可以调节刊W?℃左åÏxˆ–更低ã€?/span> </p> <p> <span style="font-size:14px;">   åQ?åQ‰å¾€å¤ç‚‰æŽ?/span> </p> <p> <span style="font-size:14px;">     å¾€å¤ç‚‰æŽ’燃烧室å…ähœ‰¾l“构合理、性能可靠、适应燃料òq¿æ³›ã€ç‡ƒçƒ§å……分等特点。大倾角往复机构,使燃料呈波浪式翻滚前˜q›ï¼Œç‡ƒæ–™ä¹‹é—´å‡ºçŽ°æŒ¤åŽ‹â€”移动—翻滚—塌落—疏杄¡­‰˜q‡ç¨‹åQŒç‰¹åˆ«é€‚应燃用人造板行业的废木料和工艺砂光粉ã€?/span> </p> <p> <span style="font-size:14px;line-height:1.5;">     å½“热负荷变动æ—? ç”Þq‡ƒæ–™è¾“入锅炉的热量也需要随之变åŠ? 才能使输出和输入的能量达到动态åã^è¡?使热媒出口温度在新的工况中稳定。每ž®æ—¶é€šè¿‡æŽ¨è¿›å™¨è¿›å…¥åŠ çƒ­ç‚‰å†…的废木料量为:推料器宽åº?m)×推料器高åº?m)×炉排速度(m/h)×200(Kg/mô”)åQŒç‚‰åž‹å®šåŽï¼ŒæŽ¨æ–™å™¨å®½åº¦å’ŒæŽ¨æ–™å™¨é«˜åº¦æ˜¯å®šå€û|¼Œæ‰€ä»¥å†³å®šåºŸæœ¨æ–™é‡å¤šž®‘的是炉排速度åQŒå¯ä»¥é€šè¿‡è°ƒèŠ‚液压传动机构使炉排速度变动来调节燃料量。特别是负荷变化量不很大åQŒå˜åŒ–的周期较短æ—Óž¼Œé€šå¸¸åªéœ€è°ƒèŠ‚炉排推进速度åQŒè¿™¿Uæ–¹æ³•åœ¨æ”¹å˜ç‡ƒæ–™é‡çš„时候,可较快地改变火床的长度ã€?/span> </p> <p> <span style="font-size:14px;line-height:1.5;">     ç ‚å…‰¾_‰ç”±æ–™ä»“下螺旋输送机输送到砂光¾_‰è¾“送风æœø™¿›é£Žå£åQŒä¸Žæ–°é£Žæ··åˆåŽç”±è¾“送管道经˜q‡é˜²å›žç«è£…ç½®åQˆå•å‘阀åQ‰è¿›å…¥ç‚‰è†›ä¸Šç ‚å…‰¾_‰å–·å˜´ç‡ƒçƒ§ã€‚砂光粉˜q›æ–™çš„调节通过螺旋输送机的变频控制来˜q›è¡Œã€‚当加热炉出口温度升高超˜q‡è®¾å®šå€¼æ—¶åQŒé™ä½Žèžºæ—‹è¾“送机的电æœø™¿è¡Œé¢‘率,减少砂光¾_‰çš„˜q›æ–™é‡ï¼›å½“加热炉出口温度降低­‘…过讑֮šå€¼æ—¶åQŒæé«˜èžºæ—‹è¾“送机的电æœø™¿è¡Œé¢‘率,增加砂光¾_‰çš„˜q›æ–™é‡ã€?/span> </p> <p> <span style="font-size:14px;line-height:1.5;">     ä»¥åºŸæœ¨æ–™ã€ç ‚光粉ä¸ÞZ¸»è¦ç‡ƒæ–™çš„加热炉,ç”׃ºŽç ‚å…‰¾_‰ç‡ƒçƒ§ç‰¹æ€§å†³å®šï¼Œç‡ƒæ–™åœ¨ç‚‰è†›å†…必须负压燃烧åQŒæ‰èƒ½ä¿è¯åŠ çƒ­ç‚‰çš„运行正常和安全可靠åQŒå› æ­¤ï¼Œé£Žé‡è°ƒèŠ‚˜q‡ç¨‹ä¸­ï¼Œé¼“风机、引风机、砂光粉输送风机间的风量匹配至关重要。调风时åQŒåº”按先开引风机,后开鼓风机,先停鼓风机,后停引风机顺序操作ã€?/span> </p> <p> <span style="font-size:14px;">风量的调节必™åÖM¸Žä¾›çƒ­é‡åŒ¹é…ï¼Œé€šè¿‡è°ƒèŠ‚风门或停、开鼓风机、引风机或通过鼓风机、引风机变频控制来实现风量的调节。通过变频调节åQŒçƒ­åª’出口温度æ‡L动范围可以调节到ûu3℃左åÏxˆ–更低ã€?/span> </p> <p> <span style="font-size:14px;">     2.燃æÑa加热ç‚?/span> </p> <p> <span style="font-size:14px;line-height:1.5;">     ç‡ƒæ–™æ²¹åœ¨ç‡ƒæÑa炉炉膛空间呈悬æÕQ状态燃烧,它需借助油喷嘴将沚w›¾åŒ–成很细的雾状粒子,一般粒径小äº?00μmåQŒä»¥å¢žåŠ æ²¹çš„燃烧反应表面¿U¯ã€‚燃油喷入炉中后åQŒé¦–先被炉内的高温烟气加热,而后蒸发成æÑa气。æÑa气遇氧即åˆÈ€ç«ç‡ƒçƒ§ï¼Œç‡ƒçƒ§äº§ç”Ÿçš„热量,其中一部分ç”Þq«ç„îC¼ ¾l™æÑaæ»ß_¼Œä½¿å…¶ä¸æ–­è’¸å‘åQŒæÑa气ç‘ô¾l­å‘外扩散,燃烧ž®Þp¿ž¾l­ä¸‹åŽ…R€?/span> </p> <p> <span style="font-size:14px;line-height:1.5;">     ä»¥æÑa作燃料,发热量大åQŒå®¹æ˜“着火燃烧,燃烧效率也高åQŒå‡ ä¹Žæ²¡æœ‰ç°åˆ†ï¼Œ˜qè¾“、贮存和˜qè¡Œè°ƒèŠ‚都很方便åQŒæ˜“于实现操作、运行的机械化和自动化ã€?/span> </p> <p> <span style="font-size:14px;line-height:1.5;">     ç‡ƒæÑa加热炉的供热负荷有变动时åQŒæŽ§åˆ¶ç³»¾lŸé€šè¿‡æŽ§åˆ¶ç‡ƒæÑa量的变化及同步调节燃烧所需½Iºæ°”量来控制˜q›å…¥åŠ çƒ­ç‚‰çš„热量åQŒä»Žè€ŒæŽ§åˆ¶çƒ­åª’出口温度的波动ã€?/span> </p> <p> <span style="font-size:14px;">   åQ?åQ‰å•ŒD늁«ç‡ƒçƒ§å™?/span> </p> <p> <span style="font-size:14px;">     ç‡ƒçƒ§å™¨åªæœ‰ä¸€ä¸ªå–·å˜ß_¼Œåœ¨æ­£å¸¸æƒ…况下åQŒç©ºæ°”量在挡板处一‹Æ¡è°ƒå¥½åƈ不再改变。燃烧器开始运行后åQŒå¯åŠ¨å¹æ‰«å’Œé¢„点火,一ŒD‰|—¶é—´åŽç‡ƒæÑaç”늣é˜€æ‰“å¼€åQŒç‡ƒæ²ÒŽµå‘å–·å˜ß_¼Œç«ç„°å‡ºçŽ°ã€‚燃烧器在温度设定点附近通过反复的开-å…Ïx¥è°ƒèŠ‚功率åQŒæ¸©åº¦çš„波动范围¾U¦äؓûu5℃左叟ë€?/span> </p> <p style="text-align:center;"> <span style="font-size:14px;"><img src="http://czrsgl6.hk25.host.35.com/uploads/image/20161020/20161020171358_2054.jpg" alt="" /><br /> </span> </p> <p> <span style="font-size:14px;">   åQ?åQ‰åŒŒD늁«ç‡ƒçƒ§å™?/span> </p> <p> <span style="font-size:14px;">     ç‡ƒçƒ§å™¨æœ‰ä¸¤ä¸ªå–·å˜´åQŒç‡ƒçƒ§å™¨å¼€å§‹è¿è¡ŒåŽåQŒå¯åŠ¨å¹æ‰«å’Œé¢„点火,一ŒD‰|—¶é—´åŽ1åïL‡ƒæ²¹ç”µ¼‚é˜€æ‰“å¼€åQŒç«ç„°å‡ºçŽŽÍ¼›ç„¶åŽæ‰“å¼€2åïL”µ¼‚é˜€åŽè¾¾åˆ°æ»¡è´Ÿè·ã€‚在温度讑֮šç‚šw™„˜q‘通过反复的打开和关é—?åïL”µ¼‚é˜€æ¥è°ƒèŠ‚功率,温度的æ‡L动范围约为Â?℃左叟ë€?/span> </p> <p style="text-align:center;"> <span style="font-size:14px;line-height:1.5;"><img src="http://czrsgl6.hk25.host.35.com/uploads/image/20161020/20161020171515_9715.jpg" alt="" /></span> </p> <p> <span style="font-size:14px;line-height:1.5;">   åQ?åQ‰ä¸‰ŒD늁«ç‡ƒçƒ§å™?/span> </p> <p> <span style="font-size:14px;line-height:1.5;">     ç‡ƒçƒ§å™¨æœ‰ä¸‰ä¸ªå–·å˜´åQŒç‡ƒçƒ§å™¨å¼€å§‹è¿è¡ŒåŽåQŒå¯åŠ¨å¹æ‰«å’Œé¢„点火,一ŒD‰|—¶é—´åŽ1åïL‡ƒæ²¹ç”µ¼‚é˜€æ‰“å¼€åQŒç«ç„°å‡ºçŽŽÍ¼›ç„¶åŽæ‰“å¼€2åïL”µ¼‚é˜€åŠ éƒ¨åˆ†è´ŸèøP¼›æ‰“å¼€3åïL”µ¼‚é˜€åŽè¾¾åˆ°æ»¡è´Ÿè·ã€‚在温度讑֮šç‚šw™„˜q‘通过反复的打开和关é—?号和3åïL”µ¼‚é˜€æ¥è°ƒèŠ‚功率,温度的æ‡L动范围约为Â?℃左叟ë€?/span> </p> <div style="text-align:center;"> <span style="font-size:14px;line-height:1.5;"><img src="http://czrsgl6.hk25.host.35.com/uploads/image/20161020/20161020171701_3029.jpg" alt="" /></span> </div> <span style="font-size:14px;line-height:1.5;">   åQ?åQ‰æ»‘动二¾U§å¼å’Œæ¯”例调节式燃烧å™?/span><span></span> <p> <br /> </p> <p> <span style="font-size:14px;line-height:1.5;">     æ­¤ç§ç‡ƒçƒ§å™¨çš„喷嘴预先讑֮šäº†æ»‘动的双çñ”控制。开动第一¾U§åŽåQŒç¬¬äºŒçñ”在恒定的旉™—´å†…持¾l­çš„增至满负èøP¼Œå½“达到额定温度后åQŒç¬¬äºŒçñ”卌™¿ž¾l­é™è‡³ç¬¬ä¸€¾U§ã€‚若用第一¾U§å·²è¾‘Öˆ°é¢å®šæ¸©åº¦åQŒåˆ™˜q™ä¸ªåŸºå‡†¾U§ä¹Ÿå…³é—­ã€‚通过在电控箱中装入合适的比例调节器,燃烧器就可按比例调节方式˜qè¡ŒåQŒå³å®žçŽ°äº†è¿ž¾l­æŽ§åˆÓž¼Œåœ¨æ‰€æœ‰è´Ÿè½½é˜¶ŒDµä¸‹éƒ½ä¿è¯ç‡ƒçƒ§åˆæ ¹{€‚滑动二¾U§å¼å’Œæ¯”例调节式燃烧器通过其功率的¾~“慢变化能与热能装置极佳的配合,温度的æ‡L动范围约为Â?℃左叟ë€?/span> </p> <p style="text-align:center;"> <span style="font-size:14px;line-height:1.5;"><img src="http://czrsgl6.hk25.host.35.com/uploads/image/20161020/20161020171711_7081.jpg" alt="" /></span> </p> <p> <span style="font-size:14px;line-height:1.5;">     3. 燃气加热ç‚?/span> </p> <p> <span style="font-size:14px;line-height:1.5;">     å¸¸ç”¨çš„气体燃料有天然气、液化石æ²ÒŽ°”和城市煤气。气体燃料的着火和燃烧十分å®ÒŽ˜“åQŒç‡ƒçƒ§é€Ÿåº¦ä¸Žç‡ƒçƒ§çš„完全½E‹åº¦å–决于气体燃料与½Iºæ°”çš„æ؜合,混合­‘Šå®Œå–„,则燃烧越˜q…速而完全ã€?/span> </p> <p> <span style="font-size:14px;line-height:1.5;">     ç‡ƒæ°”加热炉的供热负荷有变动时åQŒæŽ§åˆ¶ç³»¾lŸé€šè¿‡æŽ§åˆ¶ç‡ƒæ°”量的变化及同步调节燃烧所需½Iºæ°”量来控制˜q›å…¥åŠ çƒ­ç‚‰çš„热量åQŒä»Žè€ŒæŽ§åˆ¶çƒ­åª’出口温度的波动ã€?/span> </p> <p> <span style="font-size:14px;line-height:1.5;"><span style="font-size:14px;">     ç‡ƒæ°”加热炉的温度控制方式有滑动两¾U§å¼å’Œæ¯”例调节式ã€?/span><br /> <span style="font-size:14px;">    åQ?åQ‰æ»‘动两¾U§å¼Z</span></span> </p> <p> <span style="font-size:14px;line-height:1.5;">     ç‚¹ç«æ—Óž¼Œæ‰“å¼€ç”늣é˜€å¼€å§‹é‡Šæ”„¡‡ƒæ°”,点火燃气自蝶阀输出åQŒé€šè¿‡ä¼ºæœé©¬è¾¾æŽ§åˆ¶è‰™˜€çš„位¾|®é‡Šæ”ùNƒ¨åˆ†åŠæ»¡è´Ÿèäh‰€éœ€çš„燃气量åQŒæ»‘动两¾U§å¼Z式燃烧器的部分及满负荷变换所需的时间äؓ8¿U’,温度的æ‡L动范围约为Â?℃左叟ë€?/span> </p> <p style="text-align:center;"> <span style="font-size:14px;line-height:1.5;"><img src="http://czrsgl6.hk25.host.35.com/uploads/image/20161020/20161020172136_5966.jpg" alt="" /><br /> </span> </p> <div style="text-align:center;"> <span style="font-size:14px;line-height:1.5;"></span> </div> <span style="font-size:14px;line-height:1.5;">    åQ?åQ‰æ»‘动两¾U§å¼ZM和比例调节式M</span><span></span> <p> <br /> </p> <p> <span style="font-size:14px;line-height:1.5;"><span style="font-size:14px;">     ç‚¹ç«æ—Óž¼Œæ‰“å¼€ç”늣é˜€å¼€å§‹é‡Šæ”„¡‡ƒæ°”,点火燃气自蝶阀输出åQŒé€šè¿‡æ…¢é€Ÿè¿è¡Œä¼ºæœé©¬è¾¾æŽ§åˆ¶è¶é˜€çš„位¾|®é‡Šæ”ùNƒ¨åˆ†åŠæ»¡è´Ÿèäh‰€éœ€çš„燃气量åQŒæ»‘动两¾U§å¼ZM和比例调节式M之间的差别在于电子调节装¾|®åŠä¼ºæœé©¬è¾¾çš„运行时é—ß_¼ˆZM-20¿U?M-42¿U’)åQŒæ¸©åº¦çš„波动范围¾U¦äؓûu1℃左叟ë€?/span></span> </p> <p style="text-align:center;"> <img src="http://czrsgl6.hk25.host.35.com/uploads/image/20161020/20161020172210_0118.jpg" alt="" /> </p> <p> <span style="font-size:14px;">    4. 电加热器</span> </p> <p> <span style="font-size:14px;">     ç”µåŠ çƒ­å™¨æ ÒŽ®å‡ºå£æ²ÒŽ¸©æŽ§åˆ¶ç”µåŠ çƒ­å•å…ƒçš„投入数量,从而得到稳定可靠的热源ã€?/span> </p> <p> <span style="font-size:14px;">     å¸¸è§„的电加热器采用电加热的全开-全关式控åˆÓž¼Œ˜q™æ ·æŽ§åˆ¶æ¯”较½Ž€å•ï¼Œä½†æ¸©åº¦çš„波动较大åQŒä¸€èˆ¬åœ¨ûu3℃左叟뀂在需要稳定供热的工况下,电加热单元频¾Jçš„å¼€-停也å®ÒŽ˜“造成电加热管的损坏,为此åQŒå¯ä»¥å°†æ€ÕdŠŸçŽ‡åˆ†æˆä¸¤¾l„或多组˜q›è¡Œåˆ†åˆ«æŽ§åˆ¶åQŒé“理与燃æÑa燃烧器中的双ŒDµä¸‰ŒD늁«æ˜¯ä¸€æ ïLš„åQŒè¿™æ äh¸©åº¦çš„波动ž®±å¤§ä¸ºç¾ƒž®äº†ã€‚如果想˜q›ä¸€æ­¥æé«˜æ¸©åº¦æŽ§åˆ¶çš„¾_‘Öº¦åQŒå¯ä»¥é‡‡ç”¨å›ºæ€ç‘ô电器来无¾U§è°ƒèŠ‚电功率的投入量åQŒè¿™æ ·ä¾›çƒ­æ¸©åº¦çš„波动范围可控制在ûu1℃左叟ë€?/span> </p> <p> <span style="font-size:14px;">     5. 燃水煤浆加热ç‚?/span> </p> <p> <span style="font-size:14px;">     åœ¨çŽ¯å¢ƒä¿æŠ¤è¶Šæ¥è¶Šå—重视的çŽîC»£½C¾ä¼šåQŒè¶Šæ¥è¶Šå¤šçš„新燃料和新的燃烧方式被采用,燃水煤浆的加热炉正逐渐被开发出来åƈ成熟应用。煤¾_‰åŠ æ°´å’Œæ·ÕdŠ å‰‚制成的水煤‹¹†ç”¨èžºæ†æ³µè¾“送,采用½Iºæ°”或蒸汽雾化,送入水煤‹¹†å–·å˜´ç‡ƒçƒ§ï¼Œ˜qè¡Œ½Ž¡ç†ä¸Žé‡æ²¹ä¸€æ —÷€‚负荷变化时åQŒæ“ä½œäh员一斚w¢éœ€è¦è°ƒèŠ‚进入喷嘴的水煤‹¹†æ–™åQŒå¦ä¸€æ–šw¢éœ€è¦è°ƒèŠ‚燃烧所需的助燃风量,˜q™äº›è°ƒèŠ‚虽然也可做成多çñ”可调åQŒä½†æ˜¯è¿™äº›è°ƒèŠ‚都与操作äh员的使用¾léªŒç›¸å…³åQŒè€Œä¸æ˜¯æ°´ç…¤æµ†å–·å˜´è‡ªèín的控制系¾lŸè‡ªè¡Œå®Œæˆçš„åQŒå› æ­¤ä¾›çƒ­æ¸©åº¦çš„波动范围˜q˜æ˜¯è¾ƒå¤§åQŒä¸€èˆ¬å¯æŽ§åˆ¶åœ¨Â?℃左叟ë€?/span> </p> <p> <span style="font-size:14px;">     ä»¥ä¸Šé‡‡ç”¨çš„都是从加热炉本体燃烧设备上控制温度¾_‘Öº¦çš„方法,可以看出åQŒç‡ƒæ²¹ï¼ˆæ°”)加热炉和电加热器的热媒温度控制可以通过比例调节来达刊W?℃的¾_‘Öº¦åQŒè€Œç‡ƒç…¤é”…炉的温度控制则很难达到这æ ïLš„æ°´åã^åQŒè¿™æ øP¼Œæˆ‘们只能从工艺系¾lŸä¸Šæƒ›_Šžæ³•æ¥æé«˜æŽ§æ¸©¾_‘Öº¦ã€?/span> </p> <p> <strong><span style="font-size:14px;">二.为提高温度精度所能采取的¾pȝ»Ÿæ–ÒŽ¡ˆ</span></strong> </p> <p> <span style="font-size:14px;">     1åQŽä¸¤é€šé˜€‹¹é‡æŽ§åˆ¶</span> </p> <p> <span style="font-size:14px;">     å¦‚加热炉出口热媒温度无法直接控制在需要的¾_‘Öº¦ä»¥å†…åQŒä¹Ÿå¯é€šè¿‡ä¸¤é€šé˜€è°ƒèŠ‚‹¹é‡ä»¥æ»¡­‘›_„用热讑֤‡çš„负药‚°ƒèŠ‚。用各用热设备内被加热介质的温度来控制各支èµ\的两通调节阀åQŒæ ¹æ®è´ŸèïLš„变化调节两通阀的开度,使进入本支èµ\的热媒流量增大或减小åQŒæ»¡­‘³ç¨³å®šä¾›çƒ­çš„需要。此¿UæŽ§åˆ¶æ–¹å¼é€‚用于有多支路的调节åQŒæ¯ä¸ªç‹¬ç«‹æ”¯è·¯é˜€çš„开度只与本支èµ\内用热设备内介质的温度相养I¼Œä¸Žå…¶ä»–支路都不相兟뀂äؓ保证加热炉内热媒的åó@环流量,在旁路设¾|®äº†‹¹é‡è°ƒèŠ‚阀åQŒç”¨å‡ºç‚‰çƒ­åª’压力åQˆçƒ­åª’进出口压差或者热媒流量)来控制该阀的开度,在后面用热设备在ž®è´ŸèïLŠ¶æ€å·¥ä½œæ—¶åQŒæ—é€šé˜€å¼€å¤§ä¿è¯åŠ çƒ­ç‚‰ä¸å› ‹¹é‡é™ä½Žè€Œäñ”生粘度增加和¾l“焦的问题ã€?/span> </p> <p style="text-align:center;"> <img src="http://czrsgl6.hk25.host.35.com/uploads/image/20161020/20161020172340_9288.jpg" alt="" /> </p> <p> <span style="font-size:14px;">     2.三通阀‹¹é‡æŽ§åˆ¶</span> </p> <p> <span style="font-size:14px;">     å¦‚ç³»¾lŸä¸­åªæœ‰ä¸€ä¸ªç”¨çƒ­è®¾å¤‡ï¼Œåˆ™åˆ©ç”¨ä¸€ä¸ªä¸‰é€šè°ƒèŠ‚阀ž®±å¯˜q›è¡Œè´Ÿè·çš„调节。用热设备内的温度信åïL”¨æ¥æŽ§åˆ?/span><span style="font-size:14px;">˜q›å…¥è®‘Ö¤‡çš„热媒流量,满èƒö负荷需要,多余的热媒则通过三通阀旁èµ\回流˜q”回加热炉。用三通阀控制恒定体积‹¹é‡å·²è¢«òq¿æ³›åº”用在工业生产中åQŒåƈ被证明äؓ一¿Uç®€å•æ˜“行而又可靠的方案ã€?/span> </p> <div style="text-align:center;"> <span style="line-height:1.5;"><img src="http://czrsgl6.hk25.host.35.com/uploads/image/20161020/20161020172419_1177.jpg" alt="" /></span> </div> <p> <span style="font-size:14px;">     3.采用蓄热¾|å·¥è‰?/span> </p> <p> <span style="font-size:14px;">     åœ¨ç³»¾lŸä¸­è®„¡½®è“„热¾|ï¼Œ¾|å†…å­˜æÑa量约为系¾lŸæ€ÀLÑa量的1/4åQŒç»åŠ çƒ­ç‚‰åŠ çƒ­åŽçš„导热æÑa˜q›å…¥è“„热¾|ï¼Œç„¶åŽå†é€šè¿‡äºŒæ¬¡å¾ªçŽ¯æ³µå°†æ²ÒŽ‰“入后面各个用热点åQˆå¦‚用热讑֤‡AåQ‰ï¼Œå¦‚需要有某个不同的工艺温度点åQˆå¦‚用热讑֤‡BåQ‰ï¼Œ˜q˜å¯ä»¥ç”¨å†ïLƒ­æ²ÒŽØœåˆè°ƒèŠ‚çš„æ–ÒŽ³•å®žçŽ°ã€‚经用热讑֤‡ä½¿ç”¨åŽçš„回æÑa再进入蓄热罐åQŒç”±ä¸Õdó@环æ܇抽回加热炉再‹Æ¡åŠ çƒ­ã€‚由于主循环只流¾låŠ çƒ­ç‚‰ã€æÑa½Ž¡çº¿å’Œè“„能罐åQŒæµåŠ¨é˜»åŠ›å¾ˆž®ï¼Œå› æ­¤ä¸Õdó@环æ܇的扬½E‹å¯é€‰çš„较小åQŒä¸€èˆ¬æœ‰40~50¾cÏx‰¬½E‹å³å¯ã€‚通过蓄热¾|çš„讄¡½®åQŒå¢žåŠ äº†¾pȝ»Ÿå†…çš„å®ÒŽÑa量,钝化了负荷变化对æ²ÒŽ¸©çš„媄响,对小负荷的加热炉及系¾lŸç®¡¾U¿æ¯”较短的加热炉效果ž®¤å…¶æ˜Žæ˜¾ã€?/span> </p> <p> <br /> </p> <div style="text-align:center;"> <img src="http://czrsgl6.hk25.host.35.com/uploads/image/20161020/20161020172646_0855.jpg" alt="" /><br /> </div> <p> <span style="font-size:14px;line-height:1.5;">     4.采用二次循环工艺</span> </p> <p> <span style="font-size:14px;line-height:1.5;">     å¯¹äºŽ¾pȝ»Ÿ½Ž¡çº¿æ¯”较长和å®ÒŽÑa量大的系¾lŸï¼Œç‰¹åˆ«æ˜¯æœ‰å¤šä¸ªç”¨çƒ­æ¸©åº¦ç‚¹çš„用户可以采用多个二次循环模块来实现稳定供热。来自主循环的热油由分流式三通调节阀控制˜q›å…¥äºŒæ¬¡å¾ªçŽ¯ä¸Žå†·æ²ÒŽØœåˆï¼Œåˆ†æµå¼ä¸‰é€šè°ƒèŠ‚阀的开度由混合æ²ÒŽ¸©æŽ§åˆ¶åQŒé€šè¿‡˜q™æ ·çš„方式,可以得到恒定‹¹é‡å’Œæ’定温度的热æÑa˜q›å…¥ç”¨çƒ­è®‘Ö¤‡ã€‚特别是对于压机˜q™æ ·éœ€è¦å¤§‹¹é‡çš„用热设备,通过二次循环模块的设¾|®è§£å†³äº†å…¶ä¸Žä¸Õdó@环流量的匚w…é—®é¢˜ã€?/span> </p> <p> <br /> </p> <p style="text-align:center;"> <span style="font-size:14px;line-height:1.5;"><img src="http://czrsgl6.hk25.host.35.com/uploads/image/20161020/20161020172713_4792.jpg" alt="" /><br /> </span> </p> <p> <span style="font-size:14px;line-height:1.5;">     5.采用ž®‘量回流介质旁èµ\工艺</span> </p> <p> <span style="font-size:14px;line-height:1.5;">    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