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一种燃高炉煤气300MW发电机组低热值运行的方法,当机组运行时,通过修改逻辑定值,降低煤气热值控制值,采取此种低热值方式运行,该方法包括以下内容:1)逻辑修改,降低煤气热值设定将煤气热值设定由4400kJ/m<sup>3</sup>降到4350kJ/m<sup>3</sup>,降到4300kJ/m<sup>3</sup>,降到4250kJ/m<sup>3</sup>;2)逻辑修改,调整煤气热值高、低报警值,快减负荷保护动作值和湿态热值报警值<tables num="0001" id="ctbl0001"><table><tgroup cols="6"><colspec colname="c001" colwidth="13%" /><colspec colname="c002" colwidth="13%" /><colspec colname="c003" colwidth="13%" /><colspec colname="c004" colwidth="19%" /><colspec colname="c005" colwidth="19%" /><colspec colname="c006" colwidth="23%" /><tbody><row><entry morerows="1">热值设定值</entry><entry morerows="1">高报警值</entry><entry morerows="1">低报警值</entry><entry morerows="1">高快减负荷值</entry><entry morerows="1">低快减负荷值</entry><entry morerows="1">湿态热值报警值</entry></row><row><entry morerows="1">4400</entry><entry morerows="1">4600</entry><entry morerows="1">4200</entry><entry morerows="1">4700</entry><entry morerows="1">4100</entry><entry morerows="1">4000</entry></row><row><entry morerows="1">4350</entry><entry morerows="1">4550</entry><entry morerows="1">4150</entry><entry morerows="1">4700</entry><entry morerows="1">4100</entry><entry morerows="1">4000</entry></row><row><entry morerows="1">4300</entry><entry morerows="1">4500</entry><entry morerows="1">4100</entry><entry morerows="1">4700</entry><entry morerows="1">4050</entry><entry morerows="1">3975</entry></row><row><entry morerows="1">4250</entry><entry morerows="1">4450</entry><entry morerows="1">4100</entry><entry morerows="1">4700</entry><entry morerows="1">4050</entry><entry morerows="1">3950</entry></row></tbody></tgroup></table></tables>3)逻辑修改,增加燃烧室压力高声光报警当燃烧室压力达到1.65MPa,声光报警,运行人员手动减负荷;4)逻辑修改,增加煤压机入口导叶开度大声光报警当煤压机入口导叶开度≥65%,声光报警,运行人员手动减负荷;5)逻辑修改,取消煤压机效率低报警延时将煤压机效率低报警延时由1800s改为0s;6)监视高炉煤气压力,保持6KPa以上运行。 |