Method for controlling inlet pressure of blast-furnace top gas recovery turbine generator
A technology of power generation device and blast furnace gas, which is applied to engine components, machines/engines, mechanical equipment, etc., can solve problems such as reducing power generation, affecting service life, and unable to adjust the normal production of blast furnaces in time, so as to improve power generation and directly The effect of increasing efficiency
Inactive Publication Date: 2010-05-12
BENXI IRON & STEEL GROUP
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However, since the top pressure of the blast furnace fluctuates quite frequently within the range of the set value, especially the blast furnace needs to distribute material every 8 minutes, and when the material is distributed, the fluctuation range and frequency of the furnace top pressure will increase, while the blast furnace and The distance between the TRTs is at least twice the distance between the scrubber and the TRT. When the TRT receives the signal of the pressure fluctuation on the top of the blast furnace, it lags behind the pressure signal at the output of the scrubber at least for a period of time. Therefore, use the TRT The direct adjustment of the blast furnace top pressure is lagging behind, and the failure to adjust the blast furnace top pressure in time will affect the normal production of the blast furnace
As far as the power generation of TRT is compared with the blast furnace production, TRT is in a subordinate position. When the blast furnace top pressure fluctuates and affects its normal production, TRT will be forced to shut down. At this time, the pressurized gas output by the blast furnace will pass through the side The pipeline directly enters the gas storage part, which not only wastes blast furnace gas resources, but also reduces power generation, and at the same time affects its service life due to frequent shutdown of TRT
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[0009] see figure 1 , which shows a logic block diagram of an embodiment of the method for controlling the inlet pressure of the TRT. The control method involves the gas pressure P1 at the top of the blast furnace, the gas pressure difference ΔP between the input and output of the scrubber, the programmable logic controller PLC, the speed regulator PID and the stator blades.
[0010] The scrubber described in this embodiment is a circular slot scrubber. The scrubber with this structure has a mouth similar to a Venturi tube, and a rod controlled by a hydraulic device is installed below the mouth. A head capable of blocking the mouth of the Venturi tube is installed on the top of the rod. When the rod pulls the head downward, the distance between the head and the Venturi nozzle can be adjusted, thereby adjusting the gas pressure between the input and output of the scrubber, so the gas pressure difference between the two is basically upper constant value and set this constant v...
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The invention relates to a method for controlling the inlet pressure of blast furnace gas left-pressure turbine generator, which comprises that checking the gas pressure at the top of blast furnace and the gas pressure output by the washing machine, and the gas pressure at the inlet of turbine generator, and inputting the gas pressure values into the programmable controller, then randomly adjusting the angle of stator via the rotation speed adjuster to make the checked value of gas pressure at the inlet equal to the preset value of gas pressure. The inventive control method can eliminate the gas pressure fluctuation of blast furnace to confirm the full load generation of TRT, to improve 50% of output electricity and improve 1000 thousand of each unit.
Description
Technical field: [0001] The invention relates to a method for controlling the inlet pressure of a blast furnace gas residual pressure turbine power generation device. Background technique: [0002] The blast furnace gas residual pressure turbine power generation device is called "TRT" for short. It is a device that uses the energy of the blast furnace gas lost in the original pressure reducing valve group to drive the generator set to generate electricity through turbine expansion. The gas output from the blast furnace usually needs to pass through cyclone dust collector, scrubber, cyclone dehydrator and other components, and then input to TRT through two parallel pipelines. The scrubber is usually composed of an annular seam type scrubber. When the blast furnace gas enters the scrubber, the output pressure of the scrubber is adjusted by adjusting the size of the annular seam through a hydraulic device, that is, the input end of the annular seam in the scrubber and the Ther...
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IPC IPC(8): F01D17/12F01D15/10
Inventor 高守龙黎光刘俊李广忠崔晓峰吴林辉马广强
Owner BENXI IRON & STEEL GROUP