A method for controlling the operation of an ultra-supercritical double-reheat tower boiler
A technology for secondary reheating and tower boilers, applied in the field of boiler operation control, can solve the problems affecting boiler economy, environmental protection and safety, high oxygen content and CO concentration at the outlet of the economizer, and poor atmosphere parameters of the water wall of the furnace. and other problems, to achieve the effect of reducing the carbon content of fly ash, improving boiler economy, and improving atmosphere parameters
Active Publication Date: 2019-09-17
GUODIAN NANJING ELECTRIC POWER TEST RES CO LTD
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Problems solved by technology
The number of ultra-supercritical double-reheat tower boilers in China is relatively small, especially there are only two 1000MW ultra-supercritical double-reheat boilers in operation. During the operation of the boiler, there are oxygen and CO concentrations at the outlet of the economizer under high load. High, poor atmosphere parameters of the furnace water wall, and high carbon content in fly ash seriously affect the economy, environmental protection and safety of the boiler
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[0052] The coal mills specifically put into operation in this embodiment are ABCDEF 6 coal mills.
[0053] The specific steps of the ultra-supercritical double reheating tower boiler operation control method of the present invention are as follows:
[0054] (1) Input coal types, gradually start 6 coal mills, 2 primary fans, 2 supply fans, 2 induced draft fans, 2 air preheaters and boilers, and gradually increase the unit load to 1000MW;
[0055] (2) In the normal operation mode of the boiler, the operation mode of the coal mill, the oxygen amount of the boiler operation, the air distribution mode of the secondary air, the swing angle of the burner, the air distribution mode and angle of the SOFA air, and the horizontal angle of the SOFA air remain unchanged , carry out the boiler investigation test, actually measure the boiler efficiency, the CO concentration at the outlet of the economizer, the carbon content of the fly ash, etc., and analyze the problems existing in the boil...
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The invention discloses an ultra-supercritical secondary reheating tower-type boiler operation control method. The operation control method comprises the following steps that coals are put, six coal mills, two primary air fans, two air blowers, two air induced draft fans, two air pre-heaters and a boiler are started gradually, and a unit gradually rises the load to 1000 MW; primary wind speed thermal state leveling is carried out; the air opening degree of an oil layer is optimized and adjusted; the fineness of coal powder is optimized and adjusted; the opening degree of bias wind is optimizedand adjusted; the upwards and downwards swing angle of a combustor is optimized and adjusted; the upwards and downwards swing angle of SOFA air is optimized and adjusted; the air distribution mode ofthe SOFA air is optimized and adjusted; the secondary air distribution mode is optimized and adjusted; the horizontal angle of the low SOFA air is optimized and adjusted; and the running oxygen is optimized and adjusted. According to the control method, the operation mode of the ultra-supercritical secondary reheating tower-type boiler can be adjusted, hearth combustion is improved, the carbon content of fly ash and the CO concentration of the outlet of a coal economizer are reduced, the efficiency of the boiler is improved, the operation oxygen is optimized, and the economical efficiency, the safety and the environmental protection performance of the boiler are improved.
Description
technical field [0001] The invention relates to a boiler operation control method, in particular to an ultra-supercritical double reheat tower boiler operation control method. Background technique [0002] At present, the ultra-supercritical double reheat unit has the highest efficiency, and the coal consumption of power supply is lower than that of the ultra-supercritical single reheat unit, so the unit economy is obvious. The number of ultra-supercritical double-reheat tower boilers in China is relatively small, especially there are only two 1000MW ultra-supercritical double-reheat boilers in operation. During the operation of the boiler, there are oxygen and CO concentrations at the outlet of the economizer under high load. High, poor atmosphere parameters of the furnace water wall, and high carbon content in fly ash seriously affect the economy, environmental protection and safety of the boiler. [0003] It is of great significance to study how to improve the operation ...
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IPC IPC(8): F22B35/00F22B3/08
Inventor 陈辉戴维葆蔡培张强
Owner GUODIAN NANJING ELECTRIC POWER TEST RES CO LTD