Control system and method for saturated steam generator set

Abstract

The invention relates to the technical field of vanadium-titanium steelmaking converter processes, in particular to a control system and method for a saturated steam generator set. The control systemcomprises a steelmaking converter steam drum, a generator set heat accumulator and a steam turbine set, wherein the steelmaking converter steam drum, the generator set heat accumulator and the steam turbine set sequentially communicate with one another through a steam pipeline. The steelmaking converter steam drum is provided with a relief valve. A first switch valve is arranged on the portion, between the steelmaking converter steam drum and the generator set heat accumulator, of the steam pipeline. A flowmeter and a first regulation valve are arranged on the portion, between the generator set heat accumulator and the steam turbine set, of the steam pipeline. The first switch valve, the flowmeter and the first regulation valve are electrically connected with a PLC. When the steam pressureof the steelmaking converter steam drum is beyond a safety range, steam is relieved automatically through the relief valve; and when the steam pressure of the steelmaking converter steam drum is greater than or equal to a first pressure value, the first switch valve and the first regulation valve are controlled by the PLC to be opened. By adoption of the control system, the safety of the steelmaking converter steam drum is ensured, and automatic control for delivering saturated steam to the steam turbine set for power generation is achieved.

Description

technical field [0001] The invention relates to the technical field of vanadium-titanium steelmaking converter technology, in particular to a control system and a control method of a saturated steam generator set. Background technique [0002] In the vanadium-titanium steelmaking converter process, it is hoped that all the saturated steam generated can be sent to the saturated steam generator set for power generation. The saturated steam is first sent to the heat accumulator of the generator set through the steam pipeline for heat storage, and then the steam is stored from the generator set The device is sent to the saturated steam generator set, that is, the steam turbine unit, to convert the heat energy into electrical energy. [0003] In the vanadium-titanium steelmaking plant, the saturated steam generated by the steelmaking converter is sent to the heat accumulator of the saturated steam generator unit through the steam pipeline for energy storage. Since the length of t...

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Problems solved by technology

[0003] In the vanadium-titanium steelmaking plant, the saturated steam generated by the steelmaking converter is sent to the heat accumulator of the saturated steam generator unit through the steam pipeline for energy storage. Since the length of the steam pipeline is about 250m, when the heat storage pressure reaches 0.5MPa, the converter steam The drum pressure reaches 1.1MPa. Therefore, the steam pressure difference between the steelmaking converter steam drum and the inlet of the steam turbine unit is very large, up to 0.6MPa. As a result, the steam pressure of the steam turbine drum often exceeds the safe allowable range (less than 1.1MPa), so there is Security risks

At the same time, because the inlet pressure of the steam turbine unit has not yet reached the rated pressure, the steam turbine unit is not operating at full load, which causes the steam to be released in other ways and cannot be sent to the saturated steam turbine unit for power generation, resulting in waste of steam from the steelmaking converter

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