一、阀门材质选用
介质为甲胺液时，阀体及内件采用双相钢或尿素级316L不锈钢;介质为尿液或工艺气时，根据设计要求不同略有差异。阀体材质一般为316L，阀内件材质为316L、双相钢或尿素级316L不锈钢。常用阀门类型：直通阀、蝶阀、球阀、三通阀；介质为浓度95%及以上尿液的阀门，通常采用柱塞式结构，同时需要蒸汽保温；紧邻闪蒸罐的上游阀门内件需要加硬，削弱解析工况造成的磨损。工艺介质氨基甲酸铵溶液在高压下具有强烈的腐蚀性，阀门的抗腐蚀能力面临严峻的挑战。尿素溶液及氨基甲酸铵溶液易结晶，因此阀门自身结构必须避免结晶造成流道堵塞或阀体内部部件卡住不能正常运动。用作工艺气体放空及尿素溶液排放的阀门需要承受巨大压降。尿素合成环节操作压力大，温度高，对阀门的可靠性和安全性提出考验。阀体表面与工艺介质接触部分要避免有微小裂纹的存在。暴露在空气中的阀门附件禁止以金属铜或者含铜合金为材料。禁止使用焊接法兰形式连接或螺纹形式连接。填料盒必须尽可能地深埋在阀体内部法兰标准参照DIN 2696标准采用透镜垫方式连接或者参照ANSI B 16.5 and B 16.20标准采用环状垫连接方式。阀塞和阀杆应该为一个整体，阀座采用夹紧的方式固定。
ER、GURONGCHULI
GURONGCHULIZHUYAOSHIGAISHANGANGHEHEJINDESUXINGHERENXING，WEICHENDIANYINGHUACHULIZUOHAOZHUNBEIDENG。SHIHEJINZHONGGEZHONGXIANGCHONGFENRONGJIE，QIANGHUAGURONGTI，BINGTIGAORENXINGJIKANGSHIXINGNENG，XIAOCHUYINGLIYURUANHUA，YIBIANJIXUJIAGONGHUOCHENGXING。YUANLIJIANJIE：GURONGCHULISHIWEILERONGJIEJITINEITANHUAWU、γ’XIANGDENGYIDEDAOJUNYUNDEGUOBAOHEGURONGTI，BIANYUSHIXIAOSHIZHONGXINXICHUKELIXIXIAO、FENBUJUNYUNDETANHUAWUHEγ’DENGQIANGHUAXIANG，TONGSHIXIAOCHUYOUYULENGREJIAGONGCHANSHENGDEYINGLI，SHIHEJINFASHENGZAIJIEJING。QICI，GURONGCHULISHIWEILEHUODESHIYIDEJINGLIDU，YIBAOZHENGHEJINGAOWENKANGRUBIANXINGNENG。GURONGCHULIDEWENDUFANWEIDAYUEZAI980~1250℃ZHIJIAN，ZHUYAOGENJUGEGEHEJINZHONGXIANGXICHUHERONGJIEGUILVJISHIYONGYAOQIULAIXUANZE，YIBAOZHENGZHUYAOQIANGHUAXIANGBIYAODEXICHUTIAOJIANHEYIDINGDEJINGLIDU。TANZAIAOSHITIBUXIUGANGZHONGDERONGJIEDUYUWENDUYOUHENDAYINGXIANG。AOSHITIBUXIUGANGZAIJING400℃～850℃DEWENDUFANWEINEISHI，HUIYOUGAOGETANHUAWUXICHU，DANGGEHANLIANGJIANGZHINAIFUSHIXINGJIEXIANZHIXIA，CISHICUNZAIJINGJIEPINGE，HUICHANSHENGJINGJIANFUSHI，YANZHONGSHINENGBIANCHENGFENMO。SUOYIYOUJINGJIANFUSHIQINGXIANGDEAOSHITIBUXIUGANGYINGJINXINGGURONGRECHULIHUOWENDINGHUACHULI。
GURONGRECHULI：JIANGAOSHITIBUXIUGANGJIAREDAO1100℃ZUOYOU，SHITANHUAWUXIANGQUANBUHUOJIBENRONGJIE，TANGURONGYUAOSHITIZHONG，RANHOUKUAISULENGQUEZHISHIWEN，SHITANDADAOGUOBAOHEZHUANGTAI。ZHEIZHONGRECHULIFANGFAWEIGURONGRECHULI。GURONGRECHULIZHONGDEKUAISULENGQUESIHUXIANGPUTONGGANGDECUIHUO，DANCISHIDE‘CUIHUO’YUPUTONGGANGDECUIHUOSHIBUTONGDE，QIANZHESHIRUANHUACHULI，HOUZHESHICUIYING。HOUZHEWEIHUODEBUTONGDEYINGDUSUOCAIQUDEJIAREWENDUYEBUYIYANG，DANMEIDAO1100℃。GURONGCHULIJIANCEFANGFA：1、JINGLIDUDEDAXIAO。2、JINGJIEFUJINTANHUAWUDERONGJIEQINGKUANG。3、WANGSHUIDEFUSHINANYICHENGDU。
SAN、FAMENMIFENGMIANYANMOCUCAODU
1、YANMO，ZAIFAMENZHIZAOGUOCHENGZHONGSHIQIMIFENGMIANCHANGYONGDEYIZHONGGUANGZHENGJIAGONGFANGFA。YANMOKEYISHIFAMENMIFENGMIANHUODEHENGAODECHICUNJINGDU、JIHEXINGZHUANGCUDUJIBIAOMIANCUCAODU，DANBUNENGTIGAOMIFENGMIANGEBIAOMIANJIANDEXIANGHUWEIZHIJINGDU。YANMOHOUDEFAMENMIFENGMIANTONGCHANGKEYIDAODECHICUNJINGDUWEI 0.001~0.003mm；JIHEXINGZHUANGJINGDU（RUBUPINGDU）WEI0.001mm；BIAOMIANCUCAODUWEI0.1~0.008。
福彩3d质合走势图
2、MIFENGMIANYANMODEJIBENYUANLIBAOKUOYANMOGUOCHENG、YANMOYUNDONG、YANMOSUDU、YANMOYALIJIYANMOYULIANGWUGEFANGMIAN。
3、YANMOGUOCHENG：1）、YANJUYUMIFENGQUANBIAOMIANHENHAODIJINHEZAIYIQI，YANJUYANTIEHEBIAOMIANZUOFUZADEYANMOYUNDONG。YANJUYUMIFENGQUANBIAOMIANJIANFANGYOUYANMOJI，DANGYANJUYUMIFENGQUANBIAOMIANXIANGDUIYUNDONGSHI，YANMOJIZHONGDEBUFENMOLIZAIYANJUYUMIFENGQUANBIAOMIANJIANHUADONGHUOGUNDONG，QIEQUMIFENGQUANBIAOMIANSHANGHENBODEYICENGJINSHU。MIFENGQUANBIAOMIANSHANGDETUFENGBUFEN SHOUXIANBEIMOQU，RANHOUJIANJIANDADAOYAOQIUDEJIHEXINGZHUANG。2）、YANMOBUJINSHIMOLIAODUIJINSHUDEJIXIEJIAGONGGUOCHENG，TONGSHIHAIYOUHUAXUEZUOYONG。YANMOJIZHONGDEYOUZHINENGSHIBEIJIAGONGBIAOMIANXINGCHENGYANGHUAMO，CONGERJIASULEYANMOGUOCHENG。
4、YANMOYUNDONG：1）、YANJUYUMIFENGQUANBIAOMIANXIANGDUIYUNDONGSHI，MIFENGQUANBIAOMIANSHANGMEIYIDIANDUIYANJUDEXIANGDUIHUADONGLUHEDOUYINGGAIXIANGTONG。BINGQIE，XIANGDUIYUNDONGDEFANGXIANGYINGBUDUANBIANGENG。YUNDONGFANGXIANGDEBUDUANBIANHUASHIMEIYIMOLIBUHUIZAIMIFENGQUANBIAOMIANSHANGZHONGFUZIJIYUNDONGGUIJI，YIMIANZAOCHENGMINGXIANDEMOHENERZENGGAOMIFENGQUANBIAOMIANDECUCAODU。CIWAI，YUNDONGFANGXIANGDEWEIDUANBIANHUABUNENGSHIYANMOJIFENBUDEBIJIAOJUNYUN，CONGERJIAOJUNYUNDIQIEQUMIFENGQUANBIAOMIANDEJINSHU。2）、YANMOYUNDONGJINGUANFUZA，YUNDONGFANGXIANGJINGUANDABIANHUA，DANYANMOYUNDONGSHIZHONGSHIYANZHEYANJUYUMIFENGQUANBIAOMIANDETIEHEBIAOMIANJINXINGDE。WULUNSHISHOUGONGYANMOHUOJIXIEYANMO，MIFENGQUANBIAOMIANDEJIHEXINGZHUANGJINGDUZEZHUYAOSHOUYANJUDEJIHEXINGZHUANGJINGDUJIYANMOYUNDONGDEYINGXIANG。
5、YANMOSUDU：1）、YANMOYUNDONGDESUDUYUEKUAI，YANMODEXIAOLVYEYUEGAO。YANMOSUDUKUAI，ZAIDANWEISHIJIANNEIGONGJIANBIAOMIANSHANGTONGGUODEMOLIBIJIAODUO，QIEQUDEJINSHUYEDUO。2）、YANMOSUDUTONGCHANGWEI10~240m/min。YANMOJINGDUYAOQIUGAODEGONGJIAN，YANMOSUDUYIBANBUCHAOGUO30m/min。FAMENMIFENGMIANDEYANMOSUDUYUMIFENGMIANDECAILIAOYOUGUAN，TONGJIZHUTIEMIFENGMIANDEYANMOSUDUWEI10~45m/min；CUIYINGGANGJIYINGZHIHEJINMIFENGMIANWEI25~80m/min；AOSHITIBUXIUGANGMIFENGMIANWEI10~25m/min。
6、YANMOYALI：YANMOXIAOLVSUIYANMOYALIDEZENGDAERTIGAO，YANMOYALIBUNENGGUODA，YIBANWEI0.01～0.4MPa。YANMOZHUTIE、TONGJIAOSHITIBUXIUGANGCAILIAODEMIFENGMIANSHI，YANMOYALIWEI0.1~0.3MPa；CUIYINGGANGHEYINGZHIHEJINMIFENGMIANWEI0.15~0.4MPa。CUYANSHIQUJIAODAZHI，JINGYANSHIQUJIAOXIAOZHI。
7、YANMOYULIANG：1）、YOUYUYANMOSHIGUANGZHENGJIAGONGGONGXU，GUQIEXUELIANGHENXIAO。YANMOYULIANGDEDAXIAOQUJUEYUSHANGDAOGONGXUDEJIAGONGJINGDUHEBIAOMIANCUCAODU。ZAIBAOZHENGQUCHUSHANGDAOGONGXUJIAGONGHENJIHEXIUZHENGMIFENGQUANJIHEXINGZHUANGWUCHADEQIANTIXIA，YANMOYULIANGYUXIAOYUHAO。2）、MIFENGMIANYANMOQIANYIBANYINGJINGGUOJINGMO。JINGJINGMOHOUDEMIFENGMIANKEZHIJIEJINGYAN，QIZUIXIAOYANMOYULIANGWEI：ZHIJINGYULIANGWEI0.008~0.020mm；PINGMIANYULIANGWEI0.006~0.015mm。SHOUGONGYANMOHUOCAILIAOYINGDUJIAOGAOSHIQUXIAOZHI，JIXIEYANMOHUOCAILIAOYINGDUJIAODISHIQUDAZHI。
福彩3d质合走势图
ZONGSHANGSUOSHU，YINGXIANGFAMENNAIFUSHIXINGYINSUZHUYAOYOUYONGHUSHIYONGDEGONGKUANGTIAOJIAN、FAMENCAIZHI、CAILIAORECHULIHEFAMENMIFENGMIANYANMOCUCAODU，ZHIYAOKONGZHIHAOZHEISIFANGMIANDENEIRONG，DUITIGAOFAMENDENAIFUSHIXINGNENGYOUHENDABANGZHU。
