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　　1、減溫減壓(ya)裝置用(yong)途

　　減(jian)(jian)溫(wen)(wen)(wen)(wen)(wen)減(jian)(jian)壓(ya)(ya)(ya)(ya)裝(zhuang)置(zhi)(zhi)(zhi)是(shi)用(yong)來調節(jie)蒸(zheng)(zheng)(zheng)汽(qi)壓(ya)(ya)(ya)(ya)力(li)、溫(wen)(wen)(wen)(wen)(wen)度(du)的(de)(de)(de)重要(yao)(yao)(yao)裝(zhuang)置(zhi)(zhi)(zhi)，在(zai)火(huo)力(li)發電(dian)(dian)(dian)廠中(zhong)鍋(guo)爐(lu)產生(sheng)過(guo)熱(re)(re)(re)蒸(zheng)(zheng)(zheng)汽(qi)，如果鍋(guo)爐(lu)不(bu)裝(zhuang)備減(jian)(jian)溫(wen)(wen)(wen)(wen)(wen)器，就(jiu)無(wu)法(fa)將鍋(guo)爐(lu)出(chu)口蒸(zheng)(zheng)(zheng)汽(qi)溫(wen)(wen)(wen)(wen)(wen)度(du)控(kong)制(zhi)在(zai)需(xu)(xu)要(yao)(yao)(yao)范圍內，會使(shi)(shi)鍋(guo)爐(lu)汽(qi)輪機等(deng)(deng)(deng)設備因(yin)超溫(wen)(wen)(wen)(wen)(wen)損壞(huai)或(huo)(huo)造(zao)成重大事故。同時(shi)，在(zai)化工(gong)(gong)(gong)(gong)、輕工(gong)(gong)(gong)(gong)、醫藥、食品加工(gong)(gong)(gong)(gong)等(deng)(deng)(deng)一(yi)切使(shi)(shi)用(yong)蒸(zheng)(zheng)(zheng)汽(qi)的(de)(de)(de)生(sheng)產工(gong)(gong)(gong)(gong)藝(yi)流程(cheng)中(zhong)，過(guo)熱(re)(re)(re)蒸(zheng)(zheng)(zheng)汽(qi)作為機械能(neng)(neng)量的(de)(de)(de)產生(sheng)提供了(le)能(neng)(neng)源(yuan)。而(er)許多情況下(xia)(xia)，飽和(he)(he)蒸(zheng)(zheng)(zheng)汽(qi)是(shi)更適合使(shi)(shi)用(yong)的(de)(de)(de)，由于(yu)工(gong)(gong)(gong)(gong)藝(yi)及(ji)(ji)設備的(de)(de)(de)原因(yin)，對壓(ya)(ya)(ya)(ya)力(li)、溫(wen)(wen)(wen)(wen)(wen)度(du)的(de)(de)(de)控(kong)制(zhi)也是(shi)必不(bu)可(ke)少(shao)的(de)(de)(de)，通(tong)過(guo)減(jian)(jian)溫(wen)(wen)(wen)(wen)(wen)減(jian)(jian)壓(ya)(ya)(ya)(ya)裝(zhuang)置(zhi)(zhi)(zhi)可(ke)以得到合適的(de)(de)(de)動(dong)(dong)力(li)蒸(zheng)(zheng)(zheng)汽(qi)。例如：當換熱(re)(re)(re)器用(yong)于(yu)制(zhi)程(cheng)操作時(shi)，使(shi)(shi)用(yong)過(guo)熱(re)(re)(re)蒸(zheng)(zheng)(zheng)汽(qi)由于(yu)低(di)(di)的(de)(de)(de)傳熱(re)(re)(re)系數而(er)降低(di)(di)效(xiao)率，使(shi)(shi)用(yong)飽和(he)(he)蒸(zheng)(zheng)(zheng)汽(qi)更加適合。另外當高壓(ya)(ya)(ya)(ya)的(de)(de)(de)干(gan)飽和(he)(he)蒸(zheng)(zheng)(zheng)汽(qi)減(jian)(jian)壓(ya)(ya)(ya)(ya)至(zhi)低(di)(di)壓(ya)(ya)(ya)(ya)時(shi)，在(zai)下(xia)(xia)游出(chu)口會產生(sheng)過(guo)熱(re)(re)(re)度(du)。這樣都需(xu)(xu)要(yao)(yao)(yao)將過(guo)熱(re)(re)(re)的(de)(de)(de)蒸(zheng)(zheng)(zheng)汽(qi)降溫(wen)(wen)(wen)(wen)(wen)至(zhi)所需(xu)(xu)的(de)(de)(de)接近飽和(he)(he)的(de)(de)(de)溫(wen)(wen)(wen)(wen)(wen)度(du)，這就(jiu)需(xu)(xu)要(yao)(yao)(yao)減(jian)(jian)溫(wen)(wen)(wen)(wen)(wen)器。在(zai)很多情況下(xia)(xia)需(xu)(xu)要(yao)(yao)(yao)對高壓(ya)(ya)(ya)(ya)過(guo)熱(re)(re)(re)的(de)(de)(de)蒸(zheng)(zheng)(zheng)汽(qi)同時(shi)進行減(jian)(jian)溫(wen)(wen)(wen)(wen)(wen)和(he)(he)減(jian)(jian)壓(ya)(ya)(ya)(ya)。減(jian)(jian)溫(wen)(wen)(wen)(wen)(wen)減(jian)(jian)壓(ya)(ya)(ya)(ya)裝(zhuang)置(zhi)(zhi)(zhi)是(shi)節(jie)能(neng)(neng)環保(bao)產品。減(jian)(jian)溫(wen)(wen)(wen)(wen)(wen)減(jian)(jian)壓(ya)(ya)(ya)(ya)裝(zhuang)置(zhi)(zhi)(zhi)配上(shang)相應的(de)(de)(de)工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)自(zi)動(dong)(dong)化儀表（即(ji)熱(re)(re)(re)控(kong)柜），可(ke)對電(dian)(dian)(dian)站或(huo)(huo)工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)鍋(guo)爐(lu)及(ji)(ji)熱(re)(re)(re)電(dian)(dian)(dian)廠等(deng)(deng)(deng)處輸送來的(de)(de)(de)一(yi)次（新）蒸(zheng)(zheng)(zheng)汽(qi)壓(ya)(ya)(ya)(ya)力(li)P1、溫(wen)(wen)(wen)(wen)(wen)度(du)T1進行減(jian)(jian)溫(wen)(wen)(wen)(wen)(wen)減(jian)(jian)壓(ya)(ya)(ya)(ya)，使(shi)(shi)其二(er)次蒸(zheng)(zheng)(zheng)汽(qi)壓(ya)(ya)(ya)(ya)力(li)P2、溫(wen)(wen)(wen)(wen)(wen)度(du)T2達到生(sheng)產工(gong)(gong)(gong)(gong)藝(yi)所需(xu)(xu)的(de)(de)(de)要(yao)(yao)(yao)求(qiu)。廣泛用(yong)于(yu)熱(re)(re)(re)電(dian)(dian)(dian)廠、集中(zhong)供熱(re)(re)(re)、食品工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)、石化工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)、紡織工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)、橡膠工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)、造(zao)紙和(he)(he)紙漿工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)、煙草工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)、制(zhi)藥等(deng)(deng)(deng)其它很多行業(ye)(ye)(ye)。為了(le)滿足(zu)不(bu)同設備工(gong)(gong)(gong)(gong)藝(yi)要(yao)(yao)(yao)求(qiu)，我公司提供不(bu)同類型(xing)的(de)(de)(de)減(jian)(jian)溫(wen)(wen)(wen)(wen)(wen)減(jian)(jian)壓(ya)(ya)(ya)(ya)（減(jian)(jian)溫(wen)(wen)(wen)(wen)(wen)、減(jian)(jian)壓(ya)(ya)(ya)(ya)）器，并實(shi)現全套智能(neng)(neng)化自(zi)動(dong)(dong)控(kong)制(zhi)或(huo)(huo)DCS系統聯網。

　　減(jian)(jian)(jian)(jian)(jian)(jian)溫(wen)減(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)裝置(zhi)(zhi)根(gen)據一次(ci)(ci)（新）蒸(zheng)汽壓(ya)(ya)力P1、溫(wen)度T1、可(ke)分(fen)為高溫(wen)高壓(ya)(ya)減(jian)(jian)(jian)(jian)(jian)(jian)溫(wen)減(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)裝置(zhi)(zhi)、次(ci)(ci)高壓(ya)(ya)減(jian)(jian)(jian)(jian)(jian)(jian)溫(wen)減(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)裝置(zhi)(zhi)、中溫(wen)中壓(ya)(ya)減(jian)(jian)(jian)(jian)(jian)(jian)溫(wen)減(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)裝置(zhi)(zhi)；減(jian)(jian)(jian)(jian)(jian)(jian)溫(wen)減(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)裝置(zhi)(zhi)根(gen)據使用情況(kuang)又可(ke)分(fen)為減(jian)(jian)(jian)(jian)(jian)(jian)溫(wen)裝置(zhi)(zhi)、減(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)裝置(zhi)(zhi)、減(jian)(jian)(jian)(jian)(jian)(jian)溫(wen)減(jian)(jian)(jian)(jian)(jian)(jian)壓(ya)(ya)裝置(zhi)(zhi)，

　　減(jian)(jian)溫減(jian)(jian)壓(ya)裝(zhuang)置(zhi)一(yi)(yi)般(ban)根據(ju)一(yi)(yi)次(ci)蒸(zheng)汽(qi)（新蒸(zheng)汽(qi)）和(he)二(er)次(ci)蒸(zheng)汽(qi)（即減(jian)(jian)溫減(jian)(jian)壓(ya)后的(de)(de)蒸(zheng)汽(qi)）的(de)(de)參數(shu)及用(yong)量進行(xing)選擇(ze)，經常(chang)運(yun)行(xing)的(de)(de)減(jian)(jian)溫減(jian)(jian)壓(ya)裝(zhuang)置(zhi)一(yi)(yi)般(ban)設置(zhi)兩套(tao)，其中(zhong)一(yi)(yi)套(tao)作(zuo)為備(bei)用(yong)；不(bu)(bu)經常(chang)運(yun)行(xing)的(de)(de)減(jian)(jian)溫減(jian)(jian)壓(ya)裝(zhuang)置(zhi)一(yi)(yi)般(ban)不(bu)(bu)考慮備(bei)用(yong)；備(bei)用(yong)的(de)(de)減(jian)(jian)溫減(jian)(jian)壓(ya)裝(zhuang)置(zhi)應(ying)處于(yu)熱備(bei)用(yong)狀態。設計計算時根據(ju)二(er)次(ci)蒸(zheng)汽(qi)的(de)(de)量確定進入減(jian)(jian)溫減(jian)(jian)壓(ya)裝(zhuang)置(zhi)的(de)(de)一(yi)(yi)次(ci)蒸(zheng)汽(qi)和(he)減(jian)(jian)溫水(shui)量，減(jian)(jian)溫水(shui)壓(ya)力、溫度(du)應(ying)滿足噴水(shui)及霧化的(de)(de)要求(qiu)，水(shui)質不(bu)(bu)低于(yu)蒸(zheng)汽(qi)品質。

　　2、減溫減壓(ya)裝置(zhi)型號(hao)編制

　　裝置的型號(hao)表示方(fang)法如下：

　　注1:對(dui)于減溫(wen)裝(zhuang)置(zhi)和(he)減壓裝(zhuang)置(zhi)，其代號則(ze)分別為(wei)W或Y表(biao)示。

　　注2:型號有關的壓力(li)值，均(jun)保留一位小數。

　　例：WY80-3.82/450-0.98/260-8.0/104表(biao)示出口蒸氣(qi)流量為80t/h；進口蒸氣(qi)壓(ya)力(li)3.82MPa，溫(wen)(wen)度450℃；出口蒸汽壓(ya)力(li)為0.98MPa，溫(wen)(wen)度260℃；溫(wen)(wen)度給水壓(ya)力(li)為8.0MPa，給水溫(wen)(wen)度為104℃的減溫(wen)(wen)減壓(ya)裝置。

　　3、減溫減壓(ya)裝置執行標準(zhun)

　　減溫減壓(ya)裝置標準：JB/T6323-2002《減溫減壓(ya)裝置》

　　減(jian)(jian)溫(wen)減(jian)(jian)壓(ya)(ya)閥標準：GB/10868-2005《電站(zhan)減(jian)(jian)溫(wen)減(jian)(jian)壓(ya)(ya)閥》

　　給水調節閥標準(zhun)：GB/10869-2005《電站調節閥》

　　4、減(jian)溫(wen)減(jian)壓(ya)裝(zhuang)置分類方(fang)法

　　A、按結構分類

　　1)、一體式減(jian)溫減(jian)壓裝置；（WY型(xing)）

　　2)、分(fen)體式(shi)減溫減壓裝置；（Y-W型）

　　3)、減溫裝(zhuang)置（W型）；

　　4)、減壓裝(zhuang)置（Y型）；

　　B、按蒸汽參數分類：

　　1)、中溫中壓減(jian)溫減(jian)壓裝置(zhi)；（P1≤3.82MPa，溫度T1≤425℃）；

　　2)、次高(gao)壓減(jian)溫減(jian)壓裝置；（P1≤5.4MPa，溫度T1≤485℃）；

　　3)、高溫(wen)高壓減溫(wen)減壓裝置；（P1≤10MPa，溫(wen)度T1≤540℃）；

　　5、減(jian)溫減(jian)壓裝置主要(yao)性能指標

　　1)、進(jin)口蒸(zheng)汽(qi)壓(ya)力P1和溫(wen)度T1

　　中(zhong)溫中(zhong)壓：P1≤3.82MPa，溫度T1≤425℃。

　　次高溫高壓：P1≤5.4MPa，溫度(du)T1≤485℃。

　　高(gao)溫(wen)高(gao)壓：P1≤10MPa，溫(wen)度T1≤540℃。

　　2)、出口蒸汽流量Q

　　減(jian)溫減(jian)壓裝置出口流量Q的變化范(fan)圍為10%Q~120%Q，在此(ci)范(fan)圍內調節比較理想。

　　若有特殊(shu)要求，可與本公(gong)司協商另定。

　　3)、出口蒸汽壓力P2

　　出口(kou)蒸汽壓力P2的調節精度不(bu)(bu)低于2.5級。誤差不(bu)(bu)大于±0.04MPa；

　　4)、出口蒸汽溫度(du)T2

　　出口蒸汽溫度(du)(du)T2的調(diao)節(jie)精度(du)(du)不低于2.5級(ji)。±2.5℃；

　　5)、噪音

　　裝置正常運行時(shi)，在減溫減壓閥下(xia)游一米，同時(shi)距管壁一米處測(ce)其噪(zao)音，噪(zao)音音級應

　　不大(da)于(yu)85分貝。

　　6、減溫減壓裝置訂貨須知

　　訂合同時請(qing)提供：

　　1)、出口(kou)蒸汽(qi)流量Q、進口(kou)蒸汽(qi)壓力P1、溫(wen)度(du)T1、出口(kou)蒸汽(qi)壓力P2、溫(wen)度(du)T2；

　　2)、減溫給水壓(ya)力(li)Pb、溫度tb；

　　3)、注明控(kong)制方式(shi)；（儀表盤控(kong)制，PLC、DCS控(kong)制，DCS監視）

　　4)、控制(zhi)類別：電動(dong)、氣動(dong)、液動(dong)；

　　選擇氣動閥時還必須提供(gong)：

　　1)、作(zuo)用形式(shi)：氣開(kai)式(shi)或氣閉式(shi)；正作(zuo)用或反作(zuo)用；

　　2)、氣源壓力；

　　3)、其它附件說明：用戶如有(you)特(te)殊要求，應在(zai)商定后注明或另行簽(qian)訂(ding)技術協議(yi)。

　　注：1出口(kou)蒸(zheng)汽(qi)壓(ya)力(li)P2應不低于飽(bao)和溫度所對應的壓(ya)力(li)值，或(huo)出口(kou)蒸(zheng)汽(qi)溫度T2應不低于P2所對應的飽(bao)和溫度值；

　　2對減(jian)(jian)(jian)溫(wen)減(jian)(jian)(jian)壓一體式結(jie)構：減(jian)(jian)(jian)溫(wen)給(gei)水(shui)的壓力Pb≥0.6P1＋0.8MPa；若Pb值太低，將無法噴入減(jian)(jian)(jian)溫(wen)減(jian)(jian)(jian)壓閥內減(jian)(jian)(jian)溫(wen)。

　　（3）對(dui)減溫減壓(ya)分體式(shi)結(jie)構：減溫給水(shui)的壓(ya)力Pb≥P2＋0.6MPa；

　　附表：基本訂貨要求

　　注(zhu)：不加注(zhu)壓力值為表壓

　　減溫減壓裝置的(de)供貨范圍(wei)為括號標(biao)志以內，主要有

　　1.減(jian)壓系統：減(jian)溫(wen)減(jian)壓閥(fa)或減(jian)壓閥(fa)、節(jie)流孔板等；

　　2.減溫系統(tong)：給水調(diao)節閥(fa)或可調(diao)噴嘴、截止閥(fa)、節流閥(fa)等；

　　3.安(an)全系統：安(an)全閥(fa)、止回閥(fa)等；

　　4.管(guan)(guan)路(lu)系統(tong)：蒸汽管(guan)(guan)道、混(hun)合管(guan)(guan)道、過渡管(guan)(guan)、減溫水管(guan)(guan)等；

　　5.配(pei)套附件：截止閥、雙金屬溫(wen)度計及接管、壓力(li)表及三(san)通閥、彎道、接頭、法蘭、襯墊、