生物質鍋爐供(gong)(gong)熱(re)系(xi)(xi)(xi)統(tong)(tong)中(zhong)的(de)定(ding)(ding)壓方式：在(zai)高(gao)(gao)溫(wen)(wen)熱(re)水供(gong)(gong)給(gei)系(xi)(xi)(xi)統(tong)(tong)中(zhong)，由(you)(you)于水溫(wen)(wen)高(gao)(gao)于常(chang)壓下水的(de)飽和溫(wen)(wen)度(du)，因(yin)而，系(xi)(xi)(xi)統(tong)(tong)中(zhong)壓力應當堅(jian)持(chi)高(gao)(gao)于相(xiang)應供(gong)(gong)水溫(wen)(wen)度(du)的(de)飽和壓力，這(zhe)樣才能(neng)夠避免熱(re)水汽化(hua)和發作(zuo)水沖(chong)擊。水是(shi)不可(ke)緊縮(suo)(suo)的(de)流體，一(yi)旦(dan)走漏就會降(jiang)(jiang)壓;相(xiang)反，水加熱(re)又 會體積收縮(suo)(suo)，假如不能(neng)穩定(ding)(ding)壓力，也會毀壞供(gong)(gong)熱(re)系(xi)(xi)(xi)統(tong)(tong)中(zhong)的(de)設(she)備。由(you)(you)此，為了(le)避免降(jiang)(jiang)壓汽化(hua)和收縮(suo)(suo)升(sheng)壓，高(gao)(gao)溫(wen)(wen)熱(re)水系(xi)(xi)(xi)統(tong)(tong)必需穩定(ding)(ding)系(xi)(xi)(xi)統(tong)(tong)內(nei)的(de)壓力，這(zhe)就是(shi)定(ding)(ding)壓。

熱水供熱系統的定壓方式有以下幾種：

1），采用高架(jia)水(shui)箱定(ding)(ding)(ding)壓方式(shi)<br>這(zhe)(zhe)種(zhong)方式(shi)的定(ding)(ding)(ding)壓點設在(zai)熱(re)(re)水(shui)循環泵入(ru)口(kou)或回水(shui)主(zhu)干(gan)線上，安裝(zhuang)僅(jin)僅(jin)為一(yi)只高架(jia)水(shui)箱，其(qi)構造簡單，工作穩定(ding)(ding)(ding)牢靠，能穩定(ding)(ding)(ding)系統壓力，并能滿(man)(man)足系統網絡(luo)的溢水(shui)和(he)補水(shui)請求(qiu)。在(zai)這(zhe)(zhe)種(zhong)系統中，水(shui)箱裝(zhuang)置(zhi)高度必(bi)需滿(man)(man)足使(shi)系統中最高點不汽化的請求(qiu)。因(yin)而，裝(zhuang)置(zhi)位置(zhi)較高。這(zhe)(zhe)種(zhong)定(ding)(ding)(ding)壓方式(shi)適用與供(gong)熱(re)(re)范圍(wei)不大的低溫水(shui)供(gong)熱(re)(re)系統中。

2），采(cai)用(yong)補(bu)(bu)(bu)(bu)給(gei)(gei)(gei)(gei)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)壓(ya)(ya)(ya)(ya)方(fang)(fang)式(shi)<br>供(gong)熱系(xi)(xi)(xi)統(tong)(tong)壓(ya)(ya)(ya)(ya)力(li)(li)較高時(shi)(shi)(shi)，采(cai)用(yong)高級水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)箱(xiang)不能保(bao)證(zheng)系(xi)(xi)(xi)統(tong)(tong)所需(xu)的壓(ya)(ya)(ya)(ya)力(li)(li)，此(ci)(ci)時(shi)(shi)(shi)，應(ying)(ying)當(dang)(dang)(dang)采(cai)用(yong)補(bu)(bu)(bu)(bu)給(gei)(gei)(gei)(gei)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)壓(ya)(ya)(ya)(ya)方(fang)(fang)式(shi)。這(zhe)種(zhong)(zhong)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)壓(ya)(ya)(ya)(ya)方(fang)(fang)式(shi)在(zai)(zai)蘇聯熱水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)鍋(guo)爐(lu)(lu)(lu)(lu)供(gong)熱系(xi)(xi)(xi)統(tong)(tong)中(zhong)被普遍應(ying)(ying)用(yong)。補(bu)(bu)(bu)(bu)給(gei)(gei)(gei)(gei)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)壓(ya)(ya)(ya)(ya)有(you)連(lian)(lian)續(xu)(xu)補(bu)(bu)(bu)(bu)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)壓(ya)(ya)(ya)(ya)和(he)連(lian)(lian)續(xu)(xu)補(bu)(bu)(bu)(bu)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)壓(ya)(ya)(ya)(ya)兩(liang)種(zhong)(zhong)方(fang)(fang)式(shi)。 此(ci)(ci)生(sheng)物質(zhi)鍋(guo)爐(lu)(lu)(lu)(lu)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)壓(ya)(ya)(ya)(ya)方(fang)(fang)式(shi)的安(an)裝(zhuang)由(you)補(bu)(bu)(bu)(bu)給(gei)(gei)(gei)(gei)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)箱(xiang)，補(bu)(bu)(bu)(bu)給(gei)(gei)(gei)(gei)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)，壓(ya)(ya)(ya)(ya)力(li)(li)調(diao)理(li)(li)器等組成(cheng)。當(dang)(dang)(dang)系(xi)(xi)(xi)統(tong)(tong)運(yun)(yun)轉(zhuan)(zhuan)(zhuan)正常時(shi)(shi)(shi)，經過壓(ya)(ya)(ya)(ya)力(li)(li)調(diao)理(li)(li)器調(diao)理(li)(li)使補(bu)(bu)(bu)(bu)給(gei)(gei)(gei)(gei)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)連(lian)(lian)續(xu)(xu)補(bu)(bu)(bu)(bu)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)并(bing)(bing)使之與系(xi)(xi)(xi)統(tong)(tong)的走漏量(liang)(liang)相順應(ying)(ying)，從(cong)而維(wei)持系(xi)(xi)(xi)統(tong)(tong)壓(ya)(ya)(ya)(ya)力(li)(li)的穩(wen)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)。當(dang)(dang)(dang)循(xun)環(huan)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)停運(yun)(yun)時(shi)(shi)(shi)，能夠(gou)關閉壓(ya)(ya)(ya)(ya)力(li)(li)調(diao)理(li)(li)器前的截(jie)止閥。補(bu)(bu)(bu)(bu)給(gei)(gei)(gei)(gei)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)仍連(lian)(lian)續(xu)(xu)補(bu)(bu)(bu)(bu)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)以維(wei)持系(xi)(xi)(xi)統(tong)(tong)所需(xu)的靜(jing)壓(ya)(ya)(ya)(ya)。這(zhe)種(zhong)(zhong)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)壓(ya)(ya)(ya)(ya)方(fang)(fang)式(shi)無需(xu)收縮水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)箱(xiang)，因此(ci)(ci)設(she)備費用(yong)低(di)廉(lian)，此(ci)(ci)外，補(bu)(bu)(bu)(bu)給(gei)(gei)(gei)(gei)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)又補(bu)(bu)(bu)(bu)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)又定(ding)(ding)(ding)(ding)(ding)(ding)(ding)壓(ya)(ya)(ya)(ya)，水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)功(gong)率不大(da)，運(yun)(yun)轉(zhuan)(zhuan)(zhuan)費用(yong)也(ye)很小。因而，這(zhe)種(zhong)(zhong)方(fang)(fang)式(shi)在(zai)(zai)我國(guo)熱水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)供(gong)熱系(xi)(xi)(xi)統(tong)(tong)中(zhong)應(ying)(ying)用(yong)相當(dang)(dang)(dang)普遍。這(zhe)種(zhong)(zhong)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)壓(ya)(ya)(ya)(ya)方(fang)(fang)式(shi)最大(da)的缺陷是(shi)假如系(xi)(xi)(xi)統(tong)(tong)忽(hu)然停電時(shi)(shi)(shi)，補(bu)(bu)(bu)(bu)給(gei)(gei)(gei)(gei)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)將(jiang)失去(qu)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)壓(ya)(ya)(ya)(ya)作用(yong)。為避免(mian)此(ci)(ci)時(shi)(shi)(shi)鍋(guo)爐(lu)(lu)(lu)(lu)缺水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)汽化(hua)，系(xi)(xi)(xi)統(tong)(tong)中(zhong)采(cai)用(yong)了壓(ya)(ya)(ya)(ya)力(li)(li)上水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)輔助型安(an)裝(zhuang)，當(dang)(dang)(dang)循(xun)環(huan)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)運(yun)(yun)轉(zhuan)(zhuan)(zhuan)時(shi)(shi)(shi)，由(you)于上水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)輔助安(an)裝(zhuang)，循(xun)環(huan)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)不會倒(dao)灌到(dao)壓(ya)(ya)(ya)(ya)力(li)(li)上升(sheng)系(xi)(xi)(xi)統(tong)(tong)中(zhong)去(qu)。當(dang)(dang)(dang)忽(hu)然停電而使循(xun)環(huan)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)，補(bu)(bu)(bu)(bu)給(gei)(gei)(gei)(gei)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)停運(yun)(yun)時(shi)(shi)(shi)，壓(ya)(ya)(ya)(ya)力(li)(li)上水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)系(xi)(xi)(xi)統(tong)(tong)立(li)刻投入(ru)運(yun)(yun)轉(zhuan)(zhuan)(zhuan)，止回閥被自(zi)動(dong)(dong)(dong)翻開，壓(ya)(ya)(ya)(ya)力(li)(li)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)將(jiang)流經熱水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)鍋(guo)爐(lu)(lu)(lu)(lu)并(bing)(bing)從(cong)集氣罐排出，從(cong)而防止了爐(lu)(lu)(lu)(lu)室余熱惹起鍋(guo)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)汽化(hua)。與此(ci)(ci)同時(shi)(shi)(shi)的操(cao)作是(shi)應(ying)(ying)該關閉供(gong)，回熱水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)管總閥，使得熱源(yuan)和(he)熱網隔絕開來。 生(sheng)物質(zhi)鍋(guo)爐(lu)(lu)(lu)(lu)補(bu)(bu)(bu)(bu)給(gei)(gei)(gei)(gei)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)連(lian)(lian)續(xu)(xu)補(bu)(bu)(bu)(bu)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)壓(ya)(ya)(ya)(ya)由(you)電接點壓(ya)(ya)(ya)(ya)力(li)(li)表(biao)控(kong)制來完成(cheng)，循(xun)環(huan)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)入(ru)口壓(ya)(ya)(ya)(ya)力(li)(li)能夠(gou)維(wei)持在(zai)(zai)一(yi)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)范(fan)圍(wei)內(nei)，當(dang)(dang)(dang)壓(ya)(ya)(ya)(ya)力(li)(li)低(di)于這(zhe)個范(fan)圍(wei)時(shi)(shi)(shi)，電接點壓(ya)(ya)(ya)(ya)力(li)(li)表(biao)動(dong)(dong)(dong)作并(bing)(bing)接通(tong)補(bu)(bu)(bu)(bu)給(gei)(gei)(gei)(gei)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)電動(dong)(dong)(dong)機(ji)電路，補(bu)(bu)(bu)(bu)給(gei)(gei)(gei)(gei)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)運(yun)(yun)轉(zhuan)(zhuan)(zhuan)，補(bu)(bu)(bu)(bu)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)，熱水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)循(xun)環(huan)泵(beng)(beng)(beng)入(ru)口壓(ya)(ya)(ya)(ya)力(li)(li)升(sheng)高并(bing)(bing)超(chao)越一(yi)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)范(fan)圍(wei)時(shi)(shi)(shi)，熱水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)鍋(guo)爐(lu)(lu)(lu)(lu)的壓(ya)(ya)(ya)(ya)力(li)(li)表(biao)就是(shi)切(qie)斷補(bu)(bu)(bu)(bu)給(gei)(gei)(gei)(gei)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)電源(yuan)，是(shi)補(bu)(bu)(bu)(bu)給(gei)(gei)(gei)(gei)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)停運(yun)(yun)。如此(ci)(ci)往復(fu)動(dong)(dong)(dong)作，補(bu)(bu)(bu)(bu)給(gei)(gei)(gei)(gei)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)泵(beng)(beng)(beng)連(lian)(lian)續(xu)(xu)補(bu)(bu)(bu)(bu)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)，并(bing)(bing)維(wei)持系(xi)(xi)(xi)統(tong)(tong)壓(ya)(ya)(ya)(ya)力(li)(li)在(zai)(zai)一(yi)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)范(fan)圍(wei)內(nei)動(dong)(dong)(dong)搖，這(zhe)樣系(xi)(xi)(xi)統(tong)(tong)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)壓(ya)(ya)(ya)(ya)方(fang)(fang)式(shi)，由(you)于連(lian)(lian)續(xu)(xu)補(bu)(bu)(bu)(bu)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)，就比連(lian)(lian)續(xu)(xu)補(bu)(bu)(bu)(bu)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)儉省電能，但是(shi)其調(diao)理(li)(li)和(he)定(ding)(ding)(ding)(ding)(ding)(ding)(ding)壓(ya)(ya)(ya)(ya)質(zhi)量(liang)(liang)比連(lian)(lian)續(xu)(xu)補(bu)(bu)(bu)(bu)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)(shui)方(fang)(fang)式(shi)要差，還有(you)壓(ya)(ya)(ya)(ya)力(li)(li)動(dong)(dong)(dong)搖大(da)，壓(ya)(ya)(ya)(ya)力(li)(li)表(biao)觸點動(dong)(dong)(dong)作頻繁易于損壞等缺陷。