高危介质泵机械密封及密封冲洗方案的改造

机械密封 孟 亮 中油青海油田格尔木炼油厂

  针对炼油厂催化裂化装置分馏塔底循环油浆泵的机械密封那个棋牌信誉好寿命短、泄漏频繁、检修率高的问题。文章分析了导致油浆泵机械密封泄漏的原因,分别对油浆泵机械密封的选型、机械密封冲洗方案进行了改造,改造后延长了机械密封的使用寿命,达到了长周期运行。

  催化分馏塔底油浆循环泵是炼油厂催化裂化装置的关键设备,我厂油浆泵为开一备一,由嘉利特荏原泵业有限公司制造。该泵为单级单吸悬臂式离心泵,其泵的型号为200ZPY450;流量为376m3那个棋牌信誉好/h,扬程为150 m;入口压力0.2 MPa,出口压力2.0 MPa,介质为油浆;温度340 ℃,采用波纹管式机械密封。 油浆泵输送介质温度高,密度大(840~1 010 kg/m3),含有较高浓度的催化剂(Al2O3及SiO2)等固体颗粒,最高浓度可达25 g/L,这些固体颗粒吸附性强,粘附在机封波纹管上,使波纹管波谷内沉积大量的催化剂颗粒,从而使波纹管失弹,导致机械密封频繁泄漏,给装置的长周期运行造成了很大的隐患。

1、机械密封系统失效原因分析

那个棋牌信誉好   1.1、JIXIEMIFENGXITONGJIANJIE

  我厂油浆泵机械密封采用单端面波纹管式,如图1 所示,该机械密封静环材质为碳化硅(SiC),动环材质为石墨,动环辅助密封圈材质为柔性石墨,其余材料均为不锈钢。

波纹管集装式机械密封结构组装图

TU1 BOWENGUANJIZHUANGSHIJIXIEMIFENGJIEGOUZUZHUANGTU

1-轴封圈;5-动环密封圈;6-金属波纹管;7-静环;11-水封;12-恰簧; 16-动环辅助密封圈

那个棋牌信誉好   JIXIEMIFENGDEFUZHUXITONGCAIYONGLEWAICHONGXIJIEGOU(PLAN32 FANGAN),MIFENGCHONGXIYEWEI30 ℃CUIHUAZICHANCHAIYOU,YALIWEI0.6 MPa,CHONGXIYEJINGJIFENGYAGAIJINRUMIFENGQIANG,MIFENGCHONGXIYEWENDUJIAODI,NENGJISHIDAIZOUMOCARE,FANGZHIDONGJINGHUANYIJIBOWENGUANJIEJIAO,TONGSHICHONGZOUMIFENGQIANGNEIDEZAZHIJIJIEJIAOWU,BAOZHENGMIFENGQIANGJIEJINGJIRUNHUAMOCAFU。CIWAIGAIJIXIEMIFENGHAICAIYONGLEDIYAZHENGQILENGQUEXITONG,LENGQUEZHENGQIJIQIDAOLENGQUEDEZUOYONG,TONGSHIYOUNENGFANGZHIMIFENGQIANGNEIYETIJINRUDANXINGYUANJIANQIANG,CONGERSHIBOWENGUANJIXIEMIFENGZAIGENGJIAJIEJINGDETIAOJIANXIAYUNXING。

  1.2、JIXIEMIFENGSHIXIAOYUANYINFENXI

  TONGGUODUISHIXIAOJIXIEMIFENGDECHAIXIUJIEPOUFENXI,FAXIANYINQIJIXIEMIFENGSHIXIAOXIELOUDEYUANYINZHUYAOYOUYIXIAJIGEFANGMIAN:

那个棋牌信誉好   1.2.1、GONGYICAOZUOZAOCHENGJIXIEMIFENGSHIXIAO

  在日常开停工过程中,由于操作原因造成油浆泵入口压力波动较大时,使油浆泵反生抽空、汽蚀那个棋牌信誉好及憋压等异常现象,引起较大的轴向力,使动、静环接触面分离,从而造成机封泄漏;日常操作中油浆泵输送介质中含有催化剂颗粒状物质,运转过程中进入摩擦副端面起研磨作用,造成机封波纹管内侧结焦、积碳及含固体催化剂颗粒使波纹管失弹及密封面发生剧烈磨损而失效。

那个棋牌信誉好   1.2.2、SHEBEIANZHUANGYUNXINGGUOCHENGZHONGZAOCHENGJIXIEMIFENGSHIXIAO

  JIXIEMIFENGDONGJINGHUANMIFENGDUANMIANJIANDEMOCAGONGKUANG,SHIYINGXIANGJIFENGMIFENGSHOUMINGDEZHUYAOYINSU。YOUJIANGBENGANZHUANGYUNXINGQIJIAN,JIFENGMIFENGCUNZAIYIXIAJIZHONGSHIXIAO:

那个棋牌信誉好   (1)ANZHUANGBUDANGZAOCHENGJIXIEMIFENGXIELOU

那个棋牌信誉好   ANZHUANGJIXIEMIFENGSHIYASUOLIANGGUODA,DAOZHIMOCAFUDUANMIANYANZHONGMOSUN、CASHANG;DONGHUANMIFENGQUANGUOJIN,DANHUANGWUFADIAOZHENGDONGHUANDEZHOUXIANGFUDONGLIANG;JINGHUANMIFENGMIANGUOSONG,DANGDONGHUANZHOUXIANGFUDONGSHI,JINGHUANTUOLIJINGHUANZUO。

  (2)YOUYUMIFENGDUANMIANSHIQURUNHUAYOUMOERZAOCHENGJIXIEMIFENGXIELOU

  YINDUANMIANMIFENGZAIHEDECUNZAI,ZAIMIFENGQIANGQUEFAYETISHIQIDONGBENGERFASHENGGANMOCA,ZAOCHENGJIFENGXIELOU;JIEZHIYALIDIYUBAOHEZHENGQIYALI,SHIDEMIFENGDUANMIANYEMOFASHENGSHANZHENG,SANGSHIRUNHUA,ZAOCHENGJIFENGXIELOU。

  (3)JIFENGCHONGXIZAOCHENGJIXIEMIFENGXIELOU

那个棋牌信誉好   YOUJIANGBENGJIXIEMIFENGFUZHUCHONGXIXITONGYAOBAOZHANGJIFENGLENGQUEXITONGCHONGXIYECHIXUGONGJI,FANGZHIDUANMIANCHONGXIYEZHONGDUAN,YOUJIANGBENGYUNXINGGUOCHENGZHONGCHONGXIYEZHONGDUAN,SHIMIFENGDUANMIANWENDUSHENGGAO,RUNHUAMOSHANZHENGERJIANGDIMIFENGDUANMIANDERUNHUA,CONGERJIAJUMOSUN,ZAOCHENGJIXIEMIFENGXIELOU。

2、机械密封改造方案

  2.1、CHUANLIANSHIJIXIEMIFENGJIEGOUJIGONGZUOYUANLI

那个棋牌信誉好   JIANGYOUJIANGBENGJIXIEMIFENGYOUDANDUANMIANGAIWEISHUANGDUANMIAN,GAIFANGANWEILIANGJIJIXIEMIFENG(JICHUANLIANJIFENG),RUTU2 SUOSHI。DIYIJIMIFENGJIEZHIWEICHAIYOU。LIANGJIMIFENGZHIJIANSHEXUNENGGUAN,DAIYAQINANGXUNENGQIJIARUGELIYE(FENGYE)ZUOWEIERJIMIFENGDEMIFENGJIEZHI。DANGDIYIJIMIFENGXIELOUHOU,XUNENGQIJIANGGELIJIEZHIYARUMIFENGQIANGNEI,SHIBENGSONGJIEZHIWUFAXIELOUDAODAQI,TONGSHIXUNENGQISHANGDEYALIKAIGUANBAOJING。

串联机械密封结构

那个棋牌信誉好 TU2 CHUANLIANJIXIEMIFENGJIEGOU

1-DANHUANGHEZUJIAN;2-ZHOUTAO;3-DONGHUANⅠ;4-BENGDUANGAI;5-JINGHUANⅠ;6-JINGHUANZUO;7-YAGAI;8-CHUANDONGHUAN; 9-ZHUANDONGQUAN;10-BENGZHOU;11-JINGHUANⅡ;12-DONGHUANⅡ;13-DANHUANG;14-BENGSONGHUAN;15-O XINGQUAN

  YUDANDUANMIANJIXIEMIFENGXIANGBI,CHUANLIANJIFENGJUYOUYIXIAYOUDIAN:

  (1)SHIYONGYUYOUDUYOUHAIDENGGAOWEIJIEZHI,KESHIXIANJIEZHIDELINGYICHU,JIANGDILEWEIXIANJIEZHIXIELOUDAODAQIZHONGDEFENGXIAN。

  (2)SHUANGZHONGBAOHUZUOYONG,ZHUMIFENGSHIXIAO,ERJIMIFENGKEYIDUANSHIJIANQIDAOZHUMIFENGDEZUOYONG。

  (3)TONGGUOYALIKAIGUAN,YEWEIKAIGUANKEYISHISHIJIANCEMIFENGDESHIXIAOQINGKUANG。

  2.2、API 32+53B MIFENGCHONGXIFANGANGONGZUOYUANLIJITEDIAN

那个棋牌信誉好   API 32+53B FANGANGONGZUOYUANLI:WAIBUGUANDAOXITONGWEIJIAYACHUANLIANMIFENGDEERJIMIFENGTIGONGGELIYE,YUXIANJIALEYADEQINANGXUNENGGUANTIGONGYALIJIXUNHUANXITONG,RUTU3 SUOSHI。XUNENGQIWEIYOUYADESHUANGDUANMIANMIFENGTIGONGGELIYE(FENGYE),CAIYONGHUANREQIDUIGELIYEJINXINGJIANGWEN。

密封冲洗方案API 32+53B

TU3 MIFENGCHONGXIFANGANAPI 32+53B

  TADEZHUYAOYOUDIANYOU:SHIYONGYUGAOWENGONGKUANG,QUBIEYUZICHONGXI,CONGWAIBUYINRUJIEJINGCHONGXIYE;DAIZOUMIFENGDUANMIANCHUDEZAZHIKELI,DUIMIFENGQIDAOQINGJIEZUOYONG;FENGYEYALIGAOYUJIEZHIYALI,BAOZHENGGONGYIJIEZHILINGPAIFANG;XITONGPEIYOUYALIBAOJINGKAIGUAN,KEJISHIFAXIANMIFENGSHIXIAOQINGKUANG;DANGYIJIMIFENGSHIXIAOSHIERJIMIFENGSHIXIANZHUMIFENGGONGNENG,TIGAOSHEBEIYUNXINGANQUANANJI。

3、结论

  SHISHISHANGSHUGAIZAOHOU,CUIHUALIEHUAZHUANGZHIFENLIUTADIYOUJIANGBENGP208 YUNXINGZHUANGKUANGLIANGHAO,JIXIEMIFENGCHUYUWENDINGZHUANGTAI,YOUXIAODUJUEGAOWEIJIBENGMIFENGXIELOUDEWEIXIANJIEZHIPAIFANGZHIDAQIDEYINHUAN,YUCITONGSHIWEIJIBENGMIFENGWEIXIUTIGONGYUJING,JIBENGLIANXUYUNZHUANDEKEKAOXINGDEDAOLEMINGXIANTISHENG(WOCHANGYOUJIANGBENGZHIJINYIJINGLEIJIYUNXING8 600 h WUGUZHANG),JIANGDILEJIXIUCHEJIANWEIXIUGONGZUOLIANG,JIANSHAOLEWEIXIUCHENGBEN。ZONGJIESHANGSHUGAIZAO,DECHUYIXIAJIELUN:

  (1)JIXIEMIFENGWEISHUANGDUANMIANBOWENGUANMIFENG,ZAIYIJIMIFENGSHIXIAOSHIERJIMIFENGSHIXIANZHUMIFENGGONGNENG,YUDANDUANMIANMIFENGXIANGBI,SHUANGZHONGFEICHENGYAMIFENGNENGJIANGDIHUILUXIELOUFENGXIAN,TIGAOSHEBEIYUNXINGANQUANDENGJI;

  (2)JIXIEMIFENGFUZHUXITONGDEGONGNENGZAIYUCAIYONGCHONGXI、XUNHUAN、REDUILIUDEGONGZUOFANGSHI,KONGZHIJIXIEMIFENGDEWENDU、RUNHUADENGSHIKUANGCANSHU,JIANLIJIAOLIXIANGDEJIXIEMIFENGDEGONGZUOHUANJING,TIGAOJIXIEMIFENGDEKEKAOXING,YANZHANGSHIYONGSHOUMING;YOUXIAODIGAISHANLEJIXIEMIFENGDEYUNXINGZHUANGKUANG,WEIGAOWEIJIEZHIBENGJIXIEMIFENGZHANGZHOUQIYUNXINGTIGONGLEZHONGYAOBAOZHANG。