3.3 氮气吹扫操作步骤1) 确认进站主气阀0172，1#过滤器进气阀

3.3 氮气吹扫操作步骤
1) 确认进站主气阀0172，1#过滤器进气阀0392（2#过滤器0394），1#过滤分离器出气阀0391全关，检查仪表显示正常；
2) 确认加热炉H0301、H0302和H0303预留加热炉进气阀全关；
3) 确认过滤器和残液罐排污阀、放空阀关闭；
4) 全开2#过滤分离器出气阀0393；
5) 现场可燃气体检测；
6) 制氮车进入现场，用软管连接2#过滤分离器前端排污阀（2”球阀）；
7) 通知启动制氮车设备，并调整压力，观察压力表PG0392趋于稳定；
8) 缓开2#过滤分离器前端排污阀（2”球阀），观察差压表PDG0392指示，不得大于0.017MPa；
9) 管线氮气力压稳定后，手动缓开3#预留加热炉进气阀（2”球阀），同时观察差压不得大于0.017MPa；
10) 观察、记录积液收集情况；
11) 待燃气管线出液停止，关闭加3#预留热炉进气阀；
12) 全关2#过滤器出气阀0393；
13) 关闭2#过滤器前端排污口（2”球阀）；
14) 制氮车停止运行，泄压并拆除软管；
15) 安装恢复工艺管线，检漏、燃气检测；
16) 汇报管线氮气吹扫排液结束；
17) 恢复现场，关闭作业相关许可证。
3.4 通气操作
1. 通气前准备
1) 确认连接处密封良好、紧固件齐全、完好；
2) 确认相连管线各部件正常；
3) 确认排污口阀门、放空口阀门处于关闭状态；
4) 确认过滤分离器的进出口阀门处于关闭状态；
5) 现场可燃气体检测。
2. 通气操作
1) 通知MCC和CPF，首站通气操作；
2) 站控全开进站主气阀0172；
3) 手动缓开1#过滤器进气阀0392，2#过滤器进气阀0394，使过滤分离器中的压力逐渐升高到工作压力；
4) 手动缓开1#过滤器出气阀0391，2#过滤器出气阀0393，观测差压PDG0391和PDG0392，测出起始压降，厂家设计起始压降0.01Mpa；
5) 手动缓开3#预留加热炉进气阀（2”球阀），燃气置换氮气，正常工作压降0.015～0.08 MPa；
6) 在3#预留加热炉进气阀出口，实时测量燃气含量；
7) 燃气置换完毕，关闭3#加预留热炉进气阀（2”球阀）；
8) 泄压并拆除软管；
9) 现场可燃气体检测，检漏合格。
3.5 吹扫作业结束
1) 清理作业现场；
2) 用消防水冲洗软管；
3) 恢复工艺流程；
4) 恢复场地。

結果 (英文) 3:

3.3 nitrogen purge operation procedure1) confirmed in 0172 main air valve, inlet valve 0392 1# filter (2# filter 0394), 1# filter separator outlet valve 0391 closed, check the instrument display normal;2) confirm the H0301, H0302 and H0303 heating furnace for heating furnace inlet valve is fully closed;3) confirm the filter and the residual liquid tank drain valve, vent valve closed;4) open 2# filter separator outlet valve 0393;Combustible gas detection in the field, 5;6) to enter the field of nitrogen vehicles, hose connection with the 2# filter separator front of the sewage valve (2);7) notice to start the system of nitrogen vehicle equipment, and adjust the pressure, observe the pressure gauge PG0392 tends to be stable;8) slowly open 2# filter separator (2 "ball valve), observe the differential pressure meter PDG0392 instructions, shall not be greater than 0.017MPa;9) beat pipeline is stable after manual slow to open the intake valve heating furnace for 3# (2 ball), and observe the pressure shall not be greater than 0.017MPa;10) observe and record the collection of effusion;11) to be gas pipeline out of the liquid to stop, close and 3# set aside the thermal furnace intake valve;12) off the 2# filter outlet valve 0393;13) off the 2# filter front end drain (2 "ball valve);14) to stop operation, pressure relief and remove hose;15) install the recovery process pipeline, leak detection, gas detection;16) report on the end of the pipeline nitrogen purge and drainage;17) to restore the site, close the work permit.3.4 ventilation operation1 preparation before ventilation1) confirm that the connection is well sealed, complete and complete;2) confirm the normal part of the connected pipeline;3) confirm the sewage outlet valve and vent valve in the closed state;4) confirm that the inlet and outlet valves of the filter separator are closed;Combustible gas detection in the field, 5.2 ventilation operation1) Notice MCC and CPF, first station ventilation operation;2) station control main valve 0172;3) manually slowly open 1# filter intake valve 0392, 2# filter intake valve 0394, so that the filter separator pressure gradually increased to work pressure;4) manual slow open outlet valve 0391 1# filter, 2# filter outlet valve 0393, pressure PDG0391 and PDG0392 observation, measure the initial pressure drop, manufacturers starting pressure drop 0.01Mpa;5) manually slowly open 3# reserved heating furnace air intake valve (2 "ball valve), gas replacement of nitrogen gas, the normal operating pressure drop of 0.015 ~ 0.08 MPa;6) in the 3# reserved heating furnace inlet valve outlet, real-time measurement of gas content;7) gas replacement is completed, close the 3# plus set aside the thermal furnace intake valve (2 "ball valve);8) pressure relief and remove hose;9) the combustible gas detection, leak detection qualified.3.5 the end of the sweeping operation1) clean up the work site;2) wash water hose;3) recovery process;4) recovery site.