供氣企業常用的3種管道天然氣調壓供氣方式
- TY
- 2019-07-29
供氣企業常用(yong)的3種(zhong)管道天然氣調壓供氣方(fang)式(shi)
燃氣(qi)供(gong)(gong)應企業常用的樓棟調(diao)壓、區域調(diao)壓、分(fen)(fen)戶調(diao)壓等3種管道天然氣(qi)調(diao)壓供(gong)(gong)氣(qi)方(fang)式的供(gong)(gong)氣(qi)原理，并對(dui)其進行(xing)了(le)技術性分(fen)(fen)析。然后，結合青島即(ji)墨市某小區供(gong)(gong)氣(qi)工程(cheng)設計實例，對(dui)上述3種調(diao)壓供(gong)(gong)氣(qi)方(fang)式進行(xing)了(le)經濟性比(bi)較。
1管道天然(ran)氣(qi)調(diao)壓供氣(qi)方式管道天然(ran)氣(qi)供應企業(ye)目前常采(cai)用的調(diao)壓供氣(qi)方式有如下3種：
1)樓棟調壓(ya)(ya)，低(di)壓(ya)(ya)進(jin)(jin)戶方式。在居(ju)民小(xiao)區的每(mei)棟樓側面設置1座懸掛式調壓(ya)(ya)箱，中(zhong)壓(ya)(ya)管(guan)道(dao)的天然氣(qi)經懸掛式調壓(ya)(ya)箱調壓(ya)(ya)后低(di)壓(ya)(ya)進(jin)(jin)戶，給用戶供(gong)氣(qi)其供(gong)氣(qi)原(yuan)理見圖1。 供(gong)氣(qi)企業常用的3種管(guan)道(dao)天然氣(qi)調壓(ya)(ya)供(gong)氣(qi)方式
圖1樓棟調壓供(gong)氣(qi)方式示意圖
2)區(qu)(qu)域(yu)調(diao)壓(ya)(ya)(ya)，低壓(ya)(ya)(ya)進戶(hu)方式(shi)。在居(ju)民小區(qu)(qu)內的合(he)適位(wei)置(zhi)上設置(zhi)1座中(zhong)低壓(ya)(ya)(ya)調(diao)壓(ya)(ya)(ya)柜，中(zhong)壓(ya)(ya)(ya)管(guan)道(dao)里的天(tian)然氣經調(diao)壓(ya)(ya)(ya)柜調(diao)壓(ya)(ya)(ya)后(hou)(hou)調(diao)成低壓(ya)(ya)(ya)，供應整(zheng)個小區(qu)(qu)，低壓(ya)(ya)(ya)進戶(hu)，給(gei)用(yong)戶(hu)供氣，其供氣原理見圖2。 供氣企業(ye)常用(yong)的3種管(guan)道(dao)天(tian)然氣調(diao)壓(ya)(ya)(ya)供氣方式(shi) 該調(diao)壓(ya)(ya)(ya)方式(shi)在設計過(guo)程(cheng)中(zhong)會涉及到調(diao)壓(ya)(ya)(ya)箱(xiang)位(wei)置(zhi)的選擇問題，選擇調(diao)壓(ya)(ya)(ya)箱(xiang)位(wei)置(zhi)時，要充分(fen)考(kao)慮(lv)整(zheng)個小區(qu)(qu)的建(jian)設規(gui)模，工程(cheng)幾期建(jian)設隋況，綜合(he)考(kao)慮(lv)后(hou)(hou)將調(diao)壓(ya)(ya)(ya)箱(xiang)放置(zhi)在1個能(neng)夠給(gei)整(zheng)個小區(qu)(qu)平衡供氣的位(wei)置(zhi)。
3)中(zhong)(zhong)(zhong)壓(ya)(ya)(ya)進(jin)戶，分戶調(diao)(diao)(diao)壓(ya)(ya)(ya)方式。在居民小(xiao)區內(nei)(nei)的(de)(de)合適位置設置1座(zuo)中(zhong)(zhong)(zhong)中(zhong)(zhong)(zhong)壓(ya)(ya)(ya)調(diao)(diao)(diao)壓(ya)(ya)(ya)柜，中(zhong)(zhong)(zhong)壓(ya)(ya)(ya)管(guan)道里的(de)(de)天然氣(qi)經中(zhong)(zhong)(zhong)中(zhong)(zhong)(zhong)壓(ya)(ya)(ya)調(diao)(diao)(diao)壓(ya)(ya)(ya)柜調(diao)(diao)(diao)壓(ya)(ya)(ya)后(hou)出口壓(ya)(ya)(ya)力為20~30kPa，調(diao)(diao)(diao)壓(ya)(ya)(ya)后(hou)的(de)(de)中(zhong)(zhong)(zhong)壓(ya)(ya)(ya)燃(ran)氣(qi)直(zhi)接送(song)人用戶內(nei)(nei)，在每個用戶家中(zhong)(zhong)(zhong)安裝1個戶內(nei)(nei)調(diao)(diao)(diao)壓(ya)(ya)(ya)器，燃(ran)氣(qi)經戶內(nei)(nei)調(diao)(diao)(diao)壓(ya)(ya)(ya)器調(diao)(diao)(diao)壓(ya)(ya)(ya)后(hou)供用戶使用，其供氣(qi)原(yuan)理見圖3。
3種供氣方(fang)式的技(ji)術性比較3種調(diao)壓方(fang)案的技(ji)術比較見表1。
由表1可(ke)知，燃(ran)(ran)具(ju)前壓(ya)(ya)(ya)力越接近額定壓(ya)(ya)(ya)力，燃(ran)(ran)具(ju)的運行(xing)(xing)工(gong)況(kuang)越穩定，設(she)備運行(xing)(xing)也(ye)越安(an)全(quan)，通(tong)過對3種(zhong)調(diao)(diao)壓(ya)(ya)(ya)方式(shi)的技術比(bi)較(jiao)(jiao)可(ke)以看出(chu)，分戶(hu)調(diao)(diao)壓(ya)(ya)(ya)方式(shi)具(ju)有適用(yong)(yong)范(fan)圍廣、用(yong)(yong)戶(hu)灶前壓(ya)(ya)(ya)力穩定、占地少(shao)等(deng)優點，具(ju)有其他2種(zhong)方案無法(fa)比(bi)擬的技術優勢。 從(cong)目前施工(gong)和運行(xing)(xing)的情況(kuang)來(lai)(lai)看，分戶(hu)調(diao)(diao)壓(ya)(ya)(ya)仍然存在(zai)著一些安(an)全(quan)隱患，主(zhu)要是(shi)國產戶(hu)內調(diao)(diao)壓(ya)(ya)(ya)器(qi)偶有失靈情況(kuang)發生，供氣的安(an)全(quan)性不容樂觀。目前，在(zai)使用(yong)(yong)中通(tong)常選用(yong)(yong)可(ke)靠的企業生產的分戶(hu)調(diao)(diao)壓(ya)(ya)(ya)器(qi)，或在(zai)用(yong)(yong)戶(hu)調(diao)(diao)壓(ya)(ya)(ya)器(qi)前加設(she)安(an)全(quan)切斷閥，但這樣勢必會使用(yong)(yong)戶(hu)的調(diao)(diao)壓(ya)(ya)(ya)設(she)備費用(yong)(yong)大幅度提高，而設(she)備費用(yong)(yong)的提高能否通(tong)過整個小區(qu)綜合費用(yong)(yong)來(lai)(lai)平衡，必須視小區(qu)的具(ju)體(ti)情況(kuang)進行(xing)(xing)經(jing)濟比(bi)較(jiao)(jiao)后確定。
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