1. A steam supply system for generating power by utilizing waste heat steam of a converter in a steel plant comprises the converter, a refining VD (vacuum distillation) furnace or an RH (relative humidity) furnace, a heating furnace, a steam-water separator, a drain tank, a gas boiler, a steam turbine generator, a drain pump, a converter steam main pipe, a heating furnace steam main pipe and a whole plant drain main pipe; the method is characterized in that: the converter steam outlet is respectively connected with a refining VD furnace or an RH furnace, and the converter steam is connected in parallel to a converter steam main pipe through a valve; a steam outlet of the heating furnace is connected in parallel to a steam main pipe of the heating furnace through a pipeline; the converter steam main pipe and the heating furnace steam main pipe are connected in parallel through pipelines and then connected to a steam inlet of the steam-water separator; the steam outlet of the steam-water separator is connected with a gas boiler through a pipeline, and the outlet of the gas boiler is connected with the inlet of a turbine generator.

2. The steel plant converter waste heat steam power generation steam supply system of claim 1, characterized in that: and high-power automatic steam traps are additionally arranged on steam pipelines from the converter, the heating furnace to the steam-water separator.

Background

Under the background that the steel plant strongly promotes energy conservation and emission reduction, the steel plant sends steam generated by a converter and a heating furnace into a turbine generator to generate electricity. However, in the operation process, steam generated by a converter and a heating furnace in a steel plant needs to be preferentially supplied to a VD furnace or an RH furnace in a converter refining process in the steel plant, and is influenced by the production rhythm change of the VD furnace or the RH furnace in the steel plant refining process and the periodic steam generation of the converter, so that the working condition of the steam sent into the turbonator is greatly changed, and under the severe condition, the steam carries water to cause the abnormal shutdown of the turbonator, and the safe and stable operation of the turbonator is seriously influenced.

Disclosure of Invention

The invention aims to provide a steam supply system for generating power by using waste heat steam of a converter in a steel plant, which ensures the stable working condition of steam at the inlet of a turbonator and ensures the safe and stable operation of the turbonator.

The technical scheme of the invention is as follows:

a steam supply system for generating power by utilizing waste heat steam of a converter in a steel plant comprises the converter, a refining VD (vacuum distillation) furnace or an RH (relative humidity) furnace, a heating furnace, a steam-water separator, a drain tank, a gas boiler, a steam turbine generator, a drain pump, a converter steam main pipe, a heating furnace steam main pipe and a whole plant drain main pipe; the converter steam outlet is respectively connected with a refining VD furnace or an RH furnace, and the converter steam is connected in parallel to a converter steam main pipe through a valve; a steam outlet of the heating furnace is connected in parallel to a steam main pipe of the heating furnace through a pipeline; the converter steam main pipe and the heating furnace steam main pipe are connected in parallel through pipelines and then connected to a steam inlet of the steam-water separator; the steam outlet of the steam-water separator is connected with a gas boiler through a pipeline, and the outlet of the gas boiler is connected with the inlet of a steam turbine generator; the drain outlet of the steam-water separator is connected with a drain tank through a pipeline, a drain pump is arranged on the drain tank, and the outlet of the drain pump is connected to a drain main pipe of the whole plant.

Preferably, high-power automatic steam traps are additionally arranged on steam pipelines from the converter, the heating furnace to the steam-water separator along the lines.

Preferably, a steam-water separator is additionally arranged before the steam enters the steam turbine generator.

Preferably, a gas boiler is added before the steam enters the turbine generator.

The invention has the advantages that: by arranging the automatic steam trap, the drained water in the steam pipeline in the running process can be exhausted under the general condition; the steam-water separator is arranged, so that a large amount of drained water entering a steam main pipe can be separated from steam-water when the working condition is suddenly changed, particularly when a certain converter is suddenly fed with steam, the drained water enters a drain tank, and the steam enters a gas boiler; the steam is heated by the gas boiler, so that the steam at the inlet of the turbonator can be ensured to be superheated steam, and the safe and stable operation of the turbonator is ensured.

Drawings

FIG. 1 is a diagram of a steam supply system for power generation by waste heat steam of a converter in a steel plant.

In the figure: 1-converter; 4-automatic steam trap; 5-a valve; 6, heating a furnace; 8-steam-water separator; 9-a drain tank; 10-gas boiler; 11-a steam turbine generator; 12-refining VD furnace or RH furnace; 15-a hydrophobic pump; 16-converter steam main pipe; 17-heating furnace steam main pipe; 18-whole plant drainage mother pipe.

Detailed Description

The invention is further illustrated by the following figures and examples.

Examples

A steam supply system for generating power by utilizing waste heat steam of a converter in a steel plant comprises three converters 1, three refining VD (vacuum degassing) furnaces or RH (relative humidity) furnaces 12, two heating furnaces 6, a steam-water separator 8, a drain tank 9, a gas boiler 10, a turbonator 11, a drain pump 15, a converter steam main pipe 16, a heating furnace steam main pipe 17 and a whole plant drain main pipe 18. The steam outlet of the converter 1 is respectively connected with a refining VD furnace or an RH furnace 12, and simultaneously, the steam of the converter 1 is connected in parallel to a converter steam main pipe 16 through a valve 5; a steam outlet of the heating furnace 6 is connected in parallel to a steam main pipe 17 of the heating furnace through a pipeline; a converter steam main 16; the heating furnace steam main pipe 17 is connected in parallel through a pipeline and then is connected to a steam inlet of the steam-water separator 8; the steam outlet of the steam-water separator is connected with a gas boiler 10 through a pipeline, and the outlet of the gas boiler 10 is connected with the inlet of a turbine generator; the water outlet of the water separator is connected with a drain tank 9 through a pipeline, a drain pump 15 is arranged on the drain tank, and the outlet of the drain pump is connected to a whole plant drain main pipe 18.

The high-power automatic steam traps 4 are additionally arranged on steam pipelines along the lines from the converter 1, the heating furnace 6 to the steam-water separator 8 (the specific arrangement mode is led out from the lowest point according to the actual situation on site). A steam-water separator 8 is additionally arranged before steam enters the steam turbine generator. Before steam enters the turbine generator, a gas boiler 10 is additionally arranged.

The working process is as follows: after the converter 1 generates steam, the steam is respectively sent into a refining VD furnace or an RH furnace 12, the production of the refining VD furnace or the RH furnace is preferably met, and simultaneously, the steam of the three converters 1 is connected in parallel to a converter steam main pipe 16 through a valve 5; steam generated by the heating furnace 6 is connected in parallel to a heating furnace steam main pipe 17 through a valve; the converter steam main pipe 16 and the heating furnace steam main pipe 17 are combined and then connected to a steam-water separator 8, steam separated by the steam-water separator enters a gas boiler 10 to be heated, and the steam is sent to a steam turbine generator 11 to generate power after reaching the rated operating parameters of the steam turbine generator; the separated drainage after passing through the steam-water separator 8 is stored in a drainage tank 9, a drainage pump 15 is arranged on the drainage tank, when the water level reaches a high-level set value, the drainage pump 15 is started, the drainage is sent to a whole plant drainage main pipe 18 for other users to use, and when the water level reaches a low-level set value, the drainage pump 15 is closed.

The number of the converters is not limited to three, and can be a plurality of converters; the number of the refining VD furnaces or RH furnaces is not limited to three, and can be a plurality of furnaces; the number of the heating furnaces is not limited to two, and can be a plurality of heating furnaces; the valve can be a manual valve or an electric valve.