Vertical water vapor and organic Rankine cycle parallel system driven by sintering waste heat

Abstract

The invention discloses a vertical water vapor and organic Rankine cycle parallel system driven by sintering waste heat. The vertical water vapor and organic Rankine cycle parallel system driven by the sintering waste heat comprises a vertical spiral cross-flow cooling device body used for sintered ores and provided with a high-temperature air outlet chamber, a medium-temperature air outlet chamber, a low-temperature air outlet chamber and an air inlet chamber, wherein the medium-temperature air outlet chamber is connected with a primary dust remover, then combined with an outlet of a sintering smoke fan and then connected with an evaporator, and a desulfurization and denitrification device and a chimney are sequentially connected via a smoke pipeline; the evaporator is connected with a first power generation device; the high-temperature air outlet chamber is sequentially connected with the primary dust remover, a waste heat boiler, a secondary dust remover, a cold air inlet valve, a cycle fan, a blow-off valve and the air inlet chamber via a cooling gas pipeline; the waste heat boiler is connected with a second power generation device; and the low-temperature air outlet chamber issequentially connected with the outlets of the primary dust remover and the secondary dust remover via the cooling gas pipe. By introducing an organic Rankine cycle power generation system, grading utilization is carried out on the high-temperature waste gas, medium-temperature waste gas and low-temperature waste gas which are recovered by a vertical cooling device used for the sintered ores.

Description

technical field [0001] The invention relates to high-temperature granule waste heat recovery power generation equipment and the technical field, and more specifically relates to a vertical sintering waste heat-driven water vapor and organic Rankine cycle parallel system. Background technique [0002] The efficient recovery and conversion of waste heat and pressure resources in the iron and steel industry is one of the main directions for enterprises to save energy and reduce consumption. For the sintering process, which ranks second or third in energy consumption in the iron and steel industry, the waste heat of sintering mainly consists of two parts: the sensible heat of sintering at the tail of the sintering machine, the temperature is 800−950°C, accounting for 44.5% of the energy consumption of the sintering process ; The sensible heat of flue gas discharged from the sintering machine, with an average temperature of 150−200°C, accounts for 23.6% of the energy consumption ...

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Problems solved by technology

[0003] The average temperature of the flue gas from the sintering machine generally does not exceed 150°C, but its flow rate is large; the temperature of the flue gas discharged from the wind box at the tail of the sintering machine is 300−400°C, and the maximum temperature can reach 450°C; It varies from 70 to 520°C, and the existing technology only recycles the hot exhaust gas above 250°C

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