| 摘要 |
FIELD: heating systems. ^ SUBSTANCE: inventions are designed for steam generation and gas control of boiler and can be used in heat engineering. In the boiler, all banks of boiler live steam superheater are divided into one and the same number of sections, in furnace and gas duct of the boiler they are divided as to width of sections of gas control area. Burners on boiler furnace walls are arranged in groups as per the above areas; at that, each group of burners is equipped with independent fuel and air supply system. At least one of banks of live steam superheater comprises control stage within the range of which temperature sensors of automatic gas control system of uniform steam heating in sections of superheater banks are installed. Gas control system includes measuring device of difference between steam temperatures in inlet and outlet mixing devices of each section of control stage, which is independent for each gas control zone, shaper of signal proportional to steam differential temperature value which is average for the whole control stage in each of its sections, shaper of the main signal independent for each gas control zone and proportional to difference between actual value of the above differential temperatures for the appropriate section of control stage and average value of the above differences, shaper of corrective signal individual for each gas control zone and proportional to change rate of the appropriate main signal, as well as uniform steam heating control individual for each control zone in sections of superheating banks. ^ EFFECT: increasing economy and operating reliability as well as providing uniform steam heating in sections of superheating banks. ^ 2 cl, 4 dwg |
