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CEMS 系统安装指南|从准备到施工,全流程拆解

CEMS 系统安装指南|从准备到施工,全流程拆解

启创科技

QICHUANGKEJI

为规范CEMS烟气在线监测系统的安装施工,保障系统安装质量、监测数据精准性及运行稳定性,确保系统满足国家环保相关标准及企业实际运维需求,特制定本文档。

本文详细规定了系统安装前的准备要求、安装过程中的操作规范及关键要点,适用于CEMS烟气在线监测系统的现场安装、调试及相关施工指导工作,供施工人员、运维人员及相关管理人员参照执行。

PART 01

系统安装要求

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1、监测点选择要求

1.1一般要求:

  • 位于固定污染源排放控制设备的下游和比对监测断面上游;

  • 优先选择垂直管段和烟道负压区;

  • 避开烟道弯头和断面急剧变化部位;

  • 烟道振动幅度尽可能小;

  • 安装位置应尽量避开烟气中水滴和水雾的干扰,如不能避开,应选用能够适用的检测探头及仪器;

  • 安装位置不漏风;

  • 安装 CEMS 的工作区域应设置一个防水低压配电箱,内设漏电保护器、不少于2个 10A插座,保证监测设备所需电力;

  • 应合理布置采样平台与采样孔;

  • 每台固定污染源排放设备需安装一套烟气CEMS;

  • 若排气经多个烟道进入总排放口,优先将CEMS安装在总排放口;

    应合理布置采样平台与采样孔

    a)采样或监测平台长度应>2m,宽度应>2m 或不小于采样枪长度外延 1m,周围设置 1.2m 以上的安全防护栏;

    b)采样或监测平台应易于人员和监测仪器到达,当采样平台设置在离地面高度>2m的位置时,应有通往平台的斜梯(或乙字梯、旋梯),宽度应≥0.9m;当采样平台设置在离地面高度≥20m 的位置时,应有通往平台的升降梯。

    c)当 CEMS 安装在矩形烟道时,若烟道截面的高度>4m,则不宜在烟道顶层开设参比方法采样孔;若烟道截面的宽度>4m,则应在烟道两侧开设参比方法采样孔,并设置多层采样平台。

    d)在 CEMS 监测断面下游应预留参比方法采样孔,采样孔位置和数目按照 GB/T16157的要求确定。现有污染源参比方法采样孔内径应>80mm,新建或改建污染源参比方法采样孔内径应>90mm。在互不影响测量的前提下,参比方法采样孔应尽可能靠近CEMS 监测断面。当烟道为正压烟道或有毒气时,应采用带闸板阀的密封采样孔。

1.2具体要求:

      应优先选择在垂直管段和烟道负压区域,确保所采集样品的代表性。

监测点位置需符合以下核心要求:测定位置应避开烟道弯头和断面急剧变化的部位。对于圆形烟道,颗粒物 CEMS和流速 CMS,应设置在距弯头、阀门、变径管下游方向>4倍烟道直径,以及距上述部件上游方向≥2倍烟道直径处:气态污染物CEMS,应设置在距弯头、阀门、变径管下游方向≥2倍烟道直径,以及距上述部件上游方向≥0.5倍烟道直径处。

具体需符合HJ/T75-2017《固定污染源烟气排放连续监测技术规范》7.1的要求

2、安装平台准备

2.1 平台要求

• 检修平台按400kg/m²等效均布荷载设计,超此值按实际要求或相邻楼面荷载系数设计;

• 钢平台构件设计符合《钢结构设计规范》,采用机械性能高于A3F的钢材制作;

• 平台敞开边缘设安全防护栏杆,符合GB 4053.3-83《固定式工业防护栏杆》要求;

• 铺板采用≥4mm厚防滑钢板或Φ16圆钢踏棍,避免雨天积水;

• 安装在牢固支撑结构上并刚性连接,梯间平台不得悬挂在梯段上;

• 全部采用焊接,符合《钢结构焊接规范》,钢梁平直、铺板平整,无斜扭、翘曲等缺陷;

• 制成后涂防锈漆和面漆,平台外边缘到烟囱外壁距离≥1200mm。

安装平台示意图

2.2 防护栏杆要求

• 栏杆高度≥1200mm,构件采用性能不低于Q235-A·F的钢材,宜采用焊接,符合GBJ 205技术规定;

• 扶手采用外径Φ33.5~50mm钢管,立柱采用≥50×50×4角钢或Φ33.5~50mm钢管,立柱间隙宜为1200mm(外直径);

• 横杆采用≥25×4扁钢或Φ16圆钢,横杆与上下构件净距离≤380mm;

• 挡板采用≥100×2扁钢制造,若平台边沿满足挡板功能及强度,可不另设;

• 室外栏杆、挡板与平台间隙10~20mm,室内不留间隙;

• 结构表面光滑无毛刺,无歪斜、扭曲、变形等缺陷,表面除锈并做防腐涂装;

• 扶手需承受水平垂直载荷≥500N/m。

护栏示意图

3、监测室要求

• 尺寸≥3000mm(长)×3000mm(宽)×3000mm(高),门尺寸≥1000mm(宽)×2200mm(高);

• 设窗户,尺寸≥1500mm(宽)×1000mm(高);

• 配置配电箱,含220V/8KW交流电源,1个40A总空开、2个20A空开、1个10A空开,空开需独立接地;

• 配备照明系统和冷暖空调,保证室内温度20℃~30℃、湿度≤90%,无震动;

• 配备除水除油气源,气源压力0.4~0.8Mp;

• 距地面2500mm处开孔铺设桥架(100mm×50mm),用于伴热管和电缆管路;机柜背面墙壁近地面开Ф30mm孔,用于排放废气废水;

• 做好防漏、防雷、防潮、防尘工作,提供可靠接地点,接地电阻<4Ω;

• 地面比室外高10cm,设缓坡便于搬运机柜。

PART 02

系统的安装

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监测孔开孔

共开设4个监测孔(对应监测SO₂、NOX、氧含量、温度、压力、流速、粉尘浓度),分别为采样孔、温压流监测孔、粉尘浓度监测孔、手工比对监测孔,具体要求如下:

• 孔1(粉尘浓度监测孔)、孔2(比对监测孔)、孔3(取样孔)、孔4(温压流监测孔),各孔尺寸均为Ф75mm;

• 孔2由外至内斜向下开孔,倾斜角度20°,其余孔垂直于烟囱壁开孔;

• 孔3、孔4位于气流上游,在同一水平层面;孔1、孔2在同一水平层面,两层面间距500mm;

• 孔3开孔后配备法兰密封端,手工比对时开启,平时密封。

法兰安装

钢结构烟囱(烟道):法兰直接焊接;砖混或水泥结构烟囱(烟道):法兰通过膨胀螺栓安装。

采样探头、皮托管、粉尘仪安装

三者均通过螺栓连接至法兰,紧固螺栓即可完成安装。

管路、线缆铺设

• 选择监测平台至监测室最短路径铺设,杜绝架空线无防护走线;

• 远离高压、强电、强磁、避雷器等干扰源;

• 室外电缆不得裸露,需置于桥架、金属管或PVC管内(管最小直径≥Φ25);

• 烟气伴热管不得出现死弯、U型弯,从机柜上方就近进入机柜,走线过程中定点紧固,避免磨损。

启创科技

QICHUANGKEJI

CEMS烟气在线监测系统的安装质量直接决定监测数据的准确性、可靠性,进而影响企业环保合规及系统长期稳定运行。施工过程中,需严格遵循本文档规定的安装要求及操作流程,严格把控各环节质量,确保每一项安装工作符合国家相关标准及技术规范。安装完成后,需进行全面调试及验收,确认系统各项指标达标后方可投入使用。

后续运维过程中,也应参照本文档相关要求,做好设备维护及管路、线缆的检查工作,保障系统持续稳定发挥监测作用。

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  1. CONNECT:[ UseTime:0.000461s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000709s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000306s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000273s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000511s ]
  6. SELECT * FROM `set` [ RunTime:0.000213s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000552s ]
  8. SELECT * FROM `article` WHERE `id` = 517436 LIMIT 1 [ RunTime:0.000493s ]
  9. UPDATE `article` SET `lasttime` = 1775972863 WHERE `id` = 517436 [ RunTime:0.000710s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000249s ]
  11. SELECT * FROM `article` WHERE `id` < 517436 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000421s ]
  12. SELECT * FROM `article` WHERE `id` > 517436 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000608s ]
  13. SELECT * FROM `article` WHERE `id` < 517436 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000906s ]
  14. SELECT * FROM `article` WHERE `id` < 517436 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003042s ]
  15. SELECT * FROM `article` WHERE `id` < 517436 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003887s ]
0.111315s