Alarm type sintering afterheat power generation system based on current limiting power supply circuit

Abstract

The invention discloses an alarm type sintering afterheat power generation system based on a current limiting power supply circuit. The system comprises a sintering machine hot smoke system, a hot waste gas afterheat utilization system and a sintering afterheat power generation thermodynamic system, wherein a current limiting power supply output system connected to an output end of a turbogenerator is arranged in the sintering afterheat power generation thermodynamic system, and comprises a temperature alarm circuit, the current limiting power supply circuit and an accumulator or electric equipment connected with the current limiting power supply circuit; and the current limiting power supply circuit consists of a current limiting circuit and a power supply circuit. The system improves the product stability, prolongs the product life, and improves the internal operation circuit of the product to prevent the damage of the accumulator or the electric equipment caused by overhigh voltage fluctuation.

Description

technical field [0001] The invention belongs to the technical field of sintering waste heat power generation in iron and steel plants, and in particular relates to an alarm type sintering waste heat power generation system based on a current-limiting power supply circuit. Background technique [0002] In the process of iron and steel production, the energy consumption of the sintering process accounts for about 10% of the total energy consumption, ranking second only to the iron-making process. In the total energy consumption of the sintering process, nearly 50% of the heat energy is discharged into the atmosphere in the form of sensible heat from the flue gas of the sintering machine and the exhaust gas of the cooling machine. Power generation by sintering waste heat is an important measure for steel plants to achieve energy conservation and emission reduction. [0003] The sulfur content of the flue gas in the non-desulfurization flue pipe of the sintering machine is low, ...

AI Technical Summary

Problems solved by technology

In view of the defects that the existing alarm type sintering waste heat power generation system needs to be equipped with an induction fan to extract flue gas, the operating cost is high, the failure rate is high, and the operation of waste heat power generation in the waste heat power generation method is unstable, and the thermal display utilization rate is not high, the purpose of the present invention is to To provide an alarm type sintering waste heat power generation system and method, without affecting the normal production of the sintering process and ensuring the sintering quality, the alarm type sintering waste heat can make full use of the flue gas of the non-desulfurization pipe at the tail of the sintering machine and the waste heat of the cooler exhaust gas Power generation system, and the exhaust gas from the tail of the sintering waste heat boiler is drawn without an induction fan, and the hot exhaust gas in the first and second stages of the annular cooler is drawn out and partially recycled, which can make full use of the flue gas of the sintering machine and the waste heat of the exhaust gas of the annular cooler , reduce equipment investment, reduce operating costs, and increase the power generation of the alarm-type sintering waste heat power generation system