[转帖]真空低的原因

<p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 135pt; TEXT-ALIGN: left; mso-char-indent-count: 7.5; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">&nbsp;</span></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-ALIGN: left; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">1</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">、汽轮机轴封压力不正常<span lang="EN-US">
                                <p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 28pt; TEXT-ALIGN: left; mso-char-indent-count: 2.0; mso-layout-grid-align: none;"><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">轴封压力调节阀故障；轴封供汽系统上的阀门未开或开度不足<span lang="EN-US">;</span>轴封系统事故排放阀误开；开机过程中除氧器供汽太大，造成辅汽压力低，轴封压力低。<span lang="EN-US">
                                <p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-ALIGN: left; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">2</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">、凝汽器热水井水位升高<span lang="EN-US">
                                <p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 28pt; TEXT-ALIGN: left; mso-char-indent-count: 2.0; mso-layout-grid-align: none;"><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">除盐水补水量过大（包括凝汽器事故补水门未关严）；邻机辅汽串汽或凝结水串水；凝汽器钢管漏水。<span lang="EN-US">
                                <p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-ALIGN: left; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">3</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">、凝汽器循环水量不足<span lang="EN-US">
                                <p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 28pt; TEXT-ALIGN: left; mso-char-indent-count: 2.0; mso-layout-grid-align: none;"><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">循环水泵发生故障；循环水吸水井水位低引起循环水泵汽化，使循环水量不足；凝汽器两侧的进、出口电动门未开到位；通循环水系统内的空气未排完。<span lang="EN-US">
                                <p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-ALIGN: left; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">4</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">、处于负压区域内的阀门状态误开（或误关）<span lang="EN-US">
                                <p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 28pt; TEXT-ALIGN: left; mso-char-indent-count: 2.0; mso-layout-grid-align: none;"><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">人员操作量大，难免会发生操作漏项或是误操作的情况，造成真空下降，如二期高加检修隔离过程中，启动排气误开等。<span lang="EN-US">
                                <p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-ALIGN: left; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">5</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">、轴封加热器满水或无水<span lang="EN-US">
                                <p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 28pt; TEXT-ALIGN: left; mso-char-indent-count: 2.0; mso-layout-grid-align: none;"><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">轴封加热器铜管泄漏；轴封加热器至凝汽器热水井的疏水门开度不足，或是疏水门故障；轴封加热器汽侧进、出口门开度不足，疏水量减少，使轴封加热器无水。<span lang="EN-US">
                                <p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-ALIGN: left; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">6</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">、真空泵工作失常<span lang="EN-US">
                                <p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 28pt; TEXT-ALIGN: left; mso-char-indent-count: 2.0; mso-layout-grid-align: none;"><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">夏季环境温度高影响；真空泵冷却水未投；真空泵气水分离器水位失控，水位过高或过低；凝汽器水位高使真空泵变水泵运行；真空泵出力不足（如真空泵入口滤网堵）。<span lang="EN-US"><br/><p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-ALIGN: left; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">7</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">、低压加热器汽侧无水<span lang="EN-US">
                                <p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-INDENT: 28pt; TEXT-ALIGN: left; mso-char-indent-count: 2.0; mso-layout-grid-align: none;"><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">人员疏忽大意或是工况发生变化时未能及时调整低压加热器的水位，导致低压加热器无水位运行，抽汽未能进行热交换就直接排向凝汽器热水井，使凝汽器热负荷增大，真空下降。<span lang="EN-US">
                                <p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-ALIGN: left; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">8</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">、高<span lang="EN-US">/</span>低加热器事故疏水调节门内漏过大，使凝汽器热负荷增大，真空下降。<span lang="EN-US">
                                <p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-ALIGN: left; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">9</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">、低旁关不严，内漏大，使凝汽器热负荷增大，真空下降。<span lang="EN-US">
                                <p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-ALIGN: left; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">10</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">、低压缸大气阀破损，真空下降。<span lang="EN-US">
                                <p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-ALIGN: left; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">11</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">、低压缸排汽导流装置安装或设计不合理，使排汽没有均匀分布流入凝汽器。<span lang="EN-US">
                                <p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-ALIGN: left; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">12</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">、循环水水质控制不好，胶球系统投运不好，使凝汽器钢管结垢，钢管换热效率差。<span lang="EN-US">
                                <p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-ALIGN: left; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">13</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">、真空破坏门内漏，需长期小流量补水，才能起到水封作用。<span lang="EN-US">
                                <p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-ALIGN: left; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">14</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">、机组各疏水门内漏量大，使凝汽器热负荷增大，真空下降。<span lang="EN-US">
                                <p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-ALIGN: left; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">15</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">、环境温度高，特别是夏季。<span lang="EN-US">
                                <p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-ALIGN: left; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">16</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">、炉水品质控制不好，蒸汽品质差，使凝汽器钢管汽侧结垢，使凝汽器换热效果差。<span lang="EN-US">
                                <p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-ALIGN: left; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">17</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">、凝汽器抽真空管入口没在空冷区。<span lang="EN-US">
                                <p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-ALIGN: left; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">18</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">、凉水塔配水不合理，如分配管喷嘴坏，下面的纤维波纹板损坏了等造成凉水塔冷却效果差。<span lang="EN-US">
                                <p></p></span></span></p><p></p><p></p><p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; TEXT-ALIGN: left; mso-layout-grid-align: none;"><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">19</span><span style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;">、</span><span style="FONT-SIZE: 14pt; COLOR: black; FONT-FAMILY: 仿宋_GB2312;">除氧器到凝汽器疏扩的溢放水电动门内漏大，运行中阀体温度很高。</span><span lang="EN-US" style="FONT-SIZE: 14pt; FONT-FAMILY: 仿宋_GB2312; mso-bidi-font-size: 12.0pt;"></span></p>

说的好，谢谢

总结得不错