An adjustment system and method for adding supplemental steam into steam main pipe

Abstract

The invention discloses an adjustment system and method for merging supplement steam into a steam main pipe. The adjustment system comprises a supplement steam pipeline, an A-station steam engine steam supplement main pipe and a B-station steam engine steam main pipe; a boiler is separately connected with the A-station steam engine steam supplement main pipe and the B-station steam engine steam main pipe through the supplement steam pipeline; a first series-connection valve is arranged on a connection pipeline between the supplement steam pipeline and the A-station steam engine steam supplement main pipe; and a second series-connection valve is arranged on a connection pipeline between the supplement steam pipeline and the B-station steam engine steam main pipe. The adjustment system and method have the beneficial effects that during decompression operation, the steam bleeding amount at a boiler side caused by pressure reduction can be lowered, so that temperature and pressure reduction loss is reduced; furthermore, steam efficiency decline caused by pressure reduction of the power generation B-station steam main pipe is avoided; and the adjustment system and method play an important role in cost reduction and efficiency improvement of enterprises and integral efficiency enhancement of a power generation system.

Description

technical field [0001] The invention relates to the technical field of heat supply and energy saving in power plants, in particular to an adjustment system and method for merging supplementary steam into a steam main pipe. Background technique [0002] At present, the external supplementary steam is normally incorporated into the steam main pipe of Station B as the supplementary steam of the steam turbine of Station B and the high-pressure steam of the power generation to jointly drive the steam turbine generator of Station B to generate electricity. The operating pressure of the external supplementary steam is 7.2MPa, and it is incorporated into Station B The pressure of the steam main pipe is basically maintained at about 6.4-6.6MPa, and the pressure loss along the pipeline is 0.6-0.8MPa. [0003] However, there is a safety hazard in the leakage of the external boiler tube screen. In order to ensure the safe operation of the boiler, the external boiler operates at reduced ...

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Problems solved by technology

[0003] However, there is a safety hazard in the leakage of the external boiler tube screen. In order to ensure the safe operation of the boiler, the external boiler operates at reduced pressure, and the steam pressure at the boiler outlet is adjusted to 6.2MPa. When the steam pressure is higher than 6.2MPa, the interlock release valve will be opened, and a large amount of steam will be forced to release At the same time, due to the drop in the outlet pressure of the external boiler, the operating pressure of the internal waste heat boiler and gas boiler for power generation was forced to be lowered, and the inlet pressure of the turbine was adjusted from 6.4MPa to 5.4MPa, which seriously restricted the improvement of turbine efficiency.

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