Dry quenching coke high and low voltage generation system possessing steam pressure control device

Abstract

The invention provides a dry coke quenching high / low voltage electricity generating system with steam pressure controlling device. The system includes a steam boiler, high-pressure steam turbines and low-pressure steam turbines. The invention is characterized in that the high-pressure steam turbine is parallel connected with a releasing device, which includes a manual adjusting releasing device, an automatic pressure releasing valve and a releasing outlet. The invention can ensure the normal operation of every high-pressure steam turbine and low-pressure steam turbine, eliminate the chain tripping of the high-pressure steam turbines and low-pressure steam turbines in the whole electricity generating system, and realize the automatic and manual pressure control of the high-pressure steam turbines. The structure design of the invention is rational, which can realize automatic adjustment on the steam pressure of all the high-pressure steam turbines, and ensure that the steam pressure transferred to the low-pressure steam turbines is kept in a constant range. The electricity generating system is applicable for the high / low voltage electricity generating system by waste heat in the dry coke quenching industry.

Description

technical field [0001] The invention belongs to the technical field of coking steam power generation, and in particular relates to a coke dry quenching high and low pressure power generation system with a steam pressure control device for high and low pressure power generation using steam generated by dry quenching. Background technique [0002] Coke Dry Quenching (CDQ for short) is an energy-saving technology widely used at home and abroad. Its CDQ technology uses cold inert gas or exhaust gas after combustion to combine with red heat The red coke is heat exchanged to cool the red coke, and the inert gas that has absorbed the heat of the red coke transfers the heat to the CDQ boiler to generate steam, and the cooled inert gas is blown into the CDQ furnace by the circulating fan to cool the red coke. The specific process is as follows: the coke oven pusher puts the red coke at about 1000°C into the coke pot, and exchanges heat in reverse contact with the inert circulating ga...

AI Technical Summary

Problems solved by technology

In the entire power generation system, the back-pressure high-pressure steam turbine belongs to the former standard unit. The specifications and models of the three back-pressure high-pressure steam turbines are the same, and the back-pressure operating range is 0.75-1.2MPa. Cylinder, low-pressure steam turbine generator main steam pressure range is between 0.9 ~ 1.4MPa, the disadvantages of this power generation system are: firstly, the failure of any one steam turbine unit will cause the failure of the other four groups of steam turbine units due to the fluctuation of steam pressure Second, the pressure difference between high and low pressure power generation steam turbines is obvious. In order to increase the steam flow rate of low pressure power generation, the back pressure steam pressure of high pressure power generation can only be controlled between 1.1 and 1.2 MPa; thirdly, the back pressure steam of high pressure steam turbine is higher than 1.2 A chain trip will occur at MPa, and a slight fluctuation of the main steam flow will also easily lead to a trip of the steam turbine

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