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id="dTime">2020/12/8 13:37:52</span><input type="hidden" id="ID" value="100920890"/><input type="hidden" id="TypeID" value="2"/></div> </td> <td><div id="ckepop"></div></td></tr></table><div id="Content" style="display:none;">[甉|°”癄¡§‘åQšã€Œæ”¶è—ã€ç«ç”µåŽ‚的三大系¾lŸï¼Œä½ äº†è§£å—åQŸ]:一、燃烧系¾lŸç‡ƒçƒ§ç³»¾lŸç”±è¾“煤、磨煤、燃烧、风烟、灰渣等环节¾l„成åQŒå…¶‹¹ç¨‹å¦‚图所½Cºã€‚(låQ‰è¿ç…¤ã€‚电厂的用煤量是很大的,一座装机容é‡?×30万kW的现代火力发电厂åQŒç…¤è€—率æŒ?60gåQkw.h计,每天需用标准煤...</div><div class="brand_news_con"><p style="text-indent:2em;"> 一、燃烧系¾l?</p> <p style="text-indent:2em;"> 燃烧¾pȝ»Ÿç”Þp¾“煤、磨煤、燃烧、风烟、灰渣等环节¾l„成åQŒå…¶‹¹ç¨‹å¦‚图所½Cºã€?</p> <p style="text-indent:2em;"> åQˆlåQ‰è¿ç…¤ã€‚电厂的用煤量是很大的,一座装机容é‡?×30万kW的现代火力发电厂åQŒç…¤è€—率æŒ?60gåQkw.h计,每天需用标准煤åQˆæ¯åƒå…‹ç…¤äñ”ç”?000卡热量)360åQˆgåQ‰Ã?20万(kwåQ‰Ã?4åQˆhåQ?10368t。因为电厂燃煤多用劣质煤åQŒä¸”中、小汽轮发电机组的煤耗率åœ?00~500gåQkw·h左右åQŒæ‰€ä»¥ç”¨ç…¤é‡ä¼šæ›´å¤§ã€‚据¾lŸè®¡åQŒæˆ‘国用于发ç”늚„煤约占æ€ÖMñ”量的1åQ?åQŒä¸»è¦é é“èµ\˜qè¾“åQŒçº¦å é“è·¯å…¨éƒ¨è¿è¾“量çš?0åQ…。äؓ保证电厂安全生äñ”åQŒä¸€èˆ¬è¦æ±‚电厂储备十天以上的用煤量ã€?</p> <p style="text-indent:2em;"> åQ?åQ‰ç£¨ç…¤ã€‚用火èžR或汽车、轮船等ž®†ç…¤˜qè‡³ç”µåŽ‚的储煤场后,¾låˆæ­¥ç­›é€‰å¤„理,用输煤皮带送到锅炉间的原煤仓。煤从原煤仓落入煤斗åQŒç”±¾l™ç…¤æœºé€å…¥¼‚¨ç…¤æœºç£¨æˆç…¤¾_‰ï¼Œòq¶ç»½Iºæ°”预热器来的一‹Æ¡é£Žçƒ˜å¹²òq¶å¸¦è‡³ç²—¾_‰åˆ†¼›Õd™¨ã€‚在¾_‰ç²‰åˆ†ç¦»å™¨ä¸­ž®†ä¸åˆæ ¼çš„ç²—¾_‰åˆ†¼›»è¿”回磨煤机再行¼‚¨åˆ¶åQŒåˆæ ¼çš„¾l†ç…¤¾_‰è¢«ä¸€‹Æ¡é£Žå¸¦å…¥æ—‹é£Žåˆ†ç¦»å™¨ï¼Œä½¿ç…¤¾_‰ä¸Ž½Iºæ°”分离后进入煤¾_‰ä»“ã€?</p> <p style="text-indent:2em;"> åQ?åQ‰é”…炉与燃烧。煤¾_‰ç”±å¯è°ƒèŠ‚çš„¾l™ç²‰æœºæŒ‰é”…炉需要送入一‹Æ¡é£Ž½Ž¡ï¼ŒåŒæ—¶ç”±æ—‹é£Žåˆ†¼›Õd™¨é€æ¥çš„气体(含有¾U?0åQ…å·¦åÏxœªèƒ½åˆ†¼›Õd‡ºçš„细煤粉åQ‰ï¼Œç”±æŽ’¾_‰é£Žæœºæé«˜åŽ‹å¤´åŽä½œäؓ一‹Æ¡é£Žž®†è¿›å…¥ä¸€‹Æ¡é£Ž½Ž¡çš„煤粉¾lå–·ç‡ƒå™¨å–·å…¥ç‚‰è†›å†…燃烧ã€?</p> <p style="text-indent:2em;"> <img src="http://oss.cnelc.com/kindeditor/img/20201208/20201208133612_7520.png" alt="" /> </p> <p style="text-indent:2em;"> <br /> </p> <p style="text-indent:2em;"> 电厂煤粉炉燃烧系¾lŸæµ½E‹å›¾ </p> <p style="text-indent:2em;"> 目前我国新徏电厂ä»?00MW及以上机¾l„äؓ丅R€?00MW机组的锅炉蒸发量ä¸?000tåQhåQˆäºšä¸´ç•ŒåŽ‹åŠ›åQ‰ï¼Œé‡‡ç”¨å¼ºåˆ¶å¾ªçŽ¯åQˆæˆ–自然循环åQ‰çš„汽包炉;600MW机组的锅炉äؓ2000tåQh的(汽包åQ‰ç›´‹¹é”…炉。在锅炉的四壁上åQŒå‡åŒ€åˆ†å¸ƒç€4支或8支喷燃器åQŒå°†ç…¤ç²‰åQˆæˆ–燃æÑa、天然气åQ‰å–·å…¥ç‚‰è†›ï¼Œç«ç„°å‘ˆæ—‹è½¬çŠ¶ç‡ƒçƒ§ä¸Šå‡åQŒåˆ¿UîCؓ悬æÕQ燃烧炉。在炉的™å¶ç«¯åQŒæœ‰è´®æ°´ã€è´®æ±½çš„汽包åQŒå†…有汽水分¼›»è£…¾|®ï¼Œç‚‰è†›å†…壁有彼此紧密排列的水冷壁管åQŒç‚‰è†›å†…的高温火焰将水冷壁管内的水加热成汽水混合物上升进入汽包,而炉外下降管则将汽包中的低温水靠自重下降至下˜qžç®±ä¸Žç‚‰å†…水冷壁½Ž¡æŽ¥é€šï¼Œçƒ¤ç‚‰å¤–冷水下降而炉内水冷壁½Ž¡ä¸­çƒ­æ°´è‡ªç„¶ä¸Šå‡çš„锅炉叫自然循环汽包炉,而当压力高到16.66~17.64MPaæ—Óž¼Œæ°´ã€æ±½é‡åº¦å·®å˜ž®ï¼Œå¿…须在åó@环回路中加装循环泵,即称为强制åó@环锅炉。当压力­‘…过18åQ?2MPaæ—Óž¼Œåº”采用直‹¹é”…炉ã€?</p> <p style="text-indent:2em;"> åQ?åQ‰é£ŽçƒŸç³»¾lŸã€‚送风机将冷风送到½Iºæ°”预热器加热,加热后的气体一部分¾lç£¨ç…¤æœºã€æŽ’¾_‰é£Žæœø™¿›å…¥ç‚‰è†›ï¼Œå¦ä¸€éƒ¨åˆ†¾lå–·ç‡ƒå™¨å¤–侧套筒直接˜q›å…¥ç‚‰è†›ã€‚炉膛内燃烧形成的高温烟气,沿烟道经˜q‡çƒ­å™¨ã€çœç…¤å™¨ã€ç©ºæ°”预热器逐渐降温åQŒå†¾lé™¤ž®˜å™¨é™¤åŽ»90åQ…~99åQ…(电除ž®˜å™¨å¯é™¤åŽ?9åQ…)的灰ž®˜ï¼Œ¾lå¼•é£Žæœºé€å…¥çƒŸå›±åQŒæŽ’向天½Iºã€?</p> <p style="text-indent:2em;"> åQ?åQ‰ç°æ¸£ç³»¾lŸã€‚炉膛内煤粉燃烧后生成的ž®ç°¾_’,被除ž®˜å™¨æ”‰™›†æˆç»†ç°æŽ’入冲灰沟åQŒç‡ƒçƒ§ä¸­å› ç»“焦åŞ成的大块炉渣åQŒä¸‹è½åˆ°é”…炉底部的渣斗内åQŒç»˜q‡ç¢Žæ¸£æœºç ´ç¢ŽåŽä¹ŸæŽ’入冲灰沟,再经灰渣水æ܇ž®†ç»†ç°å’Œ¼„Žç‚‰æ¸£ç»å†²ç°½Ž¡é“排往灰场åQˆæˆ–用汽车将炉渣˜qèµ°åQ‰ã€?</p> <p style="text-indent:2em;"> 二、汽水系¾l?</p> <p style="text-indent:2em;"> 火电厂的汽水¾pȝ»Ÿç”±é”…炉、汽轮机、凝汽器、除氧器、加热器½{‰è®¾å¤‡åŠ½Ž¡é“构成åQŒåŒ…括凝¾l™æ°´¾pȝ»Ÿã€å†çƒ­ç³»¾lŸã€å›žçƒ­ç³»¾lŸã€å†·å´æ°´åQˆåó@环水åQ‰ç³»¾lŸå’Œè¡¥æ°´¾pȝ»ŸåQŒå¦‚图所½Cºã€?</p> <p style="text-indent:2em;"> åQ?åQ‰ç»™æ°´ç³»¾lŸã€‚由锅炉产生的过热蒸汽沿主蒸汽管道进入汽轮机åQŒé«˜é€ŸæµåŠ¨çš„蒸汽冲动汽轮机叶片è{动,带动发电机旋转äñ”生电能。在汽轮机内作功后的蒸汽åQŒå…¶æ¸©åº¦å’ŒåŽ‹åŠ›å¤§å¤§é™ä½Žï¼Œæœ€åŽæŽ’入凝汽器òq¶è¢«å†·å´æ°´å†·å´å‡¾l“成æ°ß_¼ˆ¿UîCؓ凝结æ°ß_¼‰åQŒæ±‡é›†åœ¨å‡æ±½å™¨çš„热水井中。凝¾l“水由凝¾l“水泉|‰“至低压加热器中加热,再经除氧器除氧åƈ¾l§ç®‹åŠ çƒ­ã€‚由除氧器出来的æ°ß_¼ˆå«é”…炉给æ°ß_¼‰åQŒç»¾l™æ°´æ³µå‡åŽ‹å’Œé«˜åŽ‹åŠ çƒ­å™¨åŠ çƒ­ï¼Œæœ€åŽé€äh锅炉汽包。在çŽîC»£å¤§åž‹æœºç»„中,一般都从汽轮机的某些中间çñ”抽出作过功的部分蒸汽åQˆç§°ä¸ºæŠ½æ±½ï¼‰åQŒç”¨ä»¥åŠ çƒ­ç»™æ°ß_¼ˆå«åš¾l™æ°´å›žçƒ­å¾ªçŽ¯åQ‰ï¼Œæˆ–把作过一ŒDµåŠŸçš„蒸汽从汽轮机某一中间¾U§å…¨éƒ¨æŠ½å‡ºï¼Œé€åˆ°é”…炉的再热器中加热后再引入汽轮机的以后几¾U§ä¸­¾l§ç®‹åšåŠŸåQˆå«åšå†çƒ­åó@环)ã€?</p> <p style="text-indent:2em;"> åQ?åQ‰è¡¥æ°´ç³»¾lŸã€‚在汽水循环˜q‡ç¨‹ä¸­æ€»éš¾å…æœ‰æ±½ã€æ°´æ³„漏½{‰æŸå¤±ï¼Œä¸ºç»´æŒæ±½æ°´åó@环的正常˜q›è¡ŒåQŒå¿…™åÖM¸æ–­åœ°å‘ç³»¾lŸè¡¥å……经˜q‡åŒ–学处理的软化æ°ß_¼Œ˜q™äº›è¡¥ç»™æ°´ä¸€èˆ¬è¡¥å…¥é™¤æ°§å™¨æˆ–凝汽器中,åÏx˜¯è¡¥æ°´¾pȝ»Ÿã€?</p> <p style="text-indent:2em;"> åQ?åQ‰å†·å´æ°´åQˆåó@环水åQ‰ç³»¾lŸã€‚äؓ了将汽轮æœÞZ¸­ä½œåŠŸåŽæŽ’入凝汽器中的乏汽冷凝成水åQŒéœ€ç”±åó@环水泵从凉水塔抽取大量的冷却水送入凝汽器,冷却水吸收乏汽的热量后再回到凉水塔冷åß_¼Œå†·å´æ°´æ˜¯å¾ªçŽ¯ä½¿ç”¨çš„。这ž®±æ˜¯å†·å´æ°´æˆ–循环水系¾lŸã€?</p> <p style="text-align:center;text-indent:2em;"> <img src="http://oss.cnelc.com/kindeditor/img/20201208/20201208133627_3151.png" alt="" /> </p> <p style="text-indent:2em;"> <br /> </p> <p style="text-indent:2em;"> 电厂汽水¾pȝ»Ÿ‹¹ç¨‹½Cºæ„å›?</p> <p style="text-indent:2em;"> 三、电气系¾l?</p> <p style="text-indent:2em;"> 发电厂的甉|°”¾pȝ»ŸåQŒåŒ…括发甉|œºã€åŠ±¼‚è£…¾|®ã€åŽ‚用电¾pȝ»Ÿå’Œå‡åŽ‹å˜ç”‰|‰€½{‰ï¼Œå¦‚图所½Cºã€?</p> <p style="text-indent:2em;"> 发电机的机端电压和电‹¹éšç€å®šw‡çš„不同而各不相同,一般额定电压在10~20kV之间åQŒè€Œé¢å®šç”µ‹¹å¯è¾?OkA。发甉|œºå‘出的电能,其中一ž®éƒ¨åˆ†ï¼ˆ¾U¦å å‘电机容量的4åQ…~8åQ…)åQŒç”±åŽ‚用变压器降低电压(一般äؓ6.3kVå’?00V两个电压½{‰çñ”åQ‰åŽåQŒç»åŽ‚用配电装置ç”Þq”µ¾~†ä¾›¾l™æ°´æ³üc€é€é£Žæœºã€ç£¨ç…¤æœº½{‰å„¿Uè¾…机和电厂照明½{‰è®¾å¤‡ç”¨ç”µï¼Œ¿UîCؓ厂用电(或自用电åQ‰ã€‚其余大部分电能åQŒç”±ä¸Õd˜åŽ‹å™¨å‡åŽ‹åŽï¼Œ¾lé«˜åŽ‹é…ç”µè£…¾|®ã€è¾“ç”늺¿è·¯é€å…¥ç”늽‘ã€?</p> <p style="text-align:center;text-indent:2em;"> <img src="http://oss.cnelc.com/kindeditor/img/20201208/20201208133703_6602.png" alt="" /> </p> <p style="text-indent:2em;"> <br /> </p> <p style="text-indent:2em;"> 发电厂电气系¾lŸç¤ºæ„å›¾ </p></div><div class="meneame"><span class="disabled">< </span><span class="current">1</span> <span class="disabled">> </span></div> <div style="text-align: center;padding-top: 10px;"><img src="/images/code.jpg" alt="å…Ïx³¨æœ‰æƒŠå–?" /></div> <div 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