Sintering waste heat power generation exhaust gas recycling utilization system

Abstract

Provided is a sintering waste heat power generation exhaust gas recycling utilization system. The system is characterized in that the system is provided with a heat exchanger, heat recovery is carried out on annular cooling high-temperature hot exhaust gas collected from an annular cooling high-temperature section hot air hood, at least three air duct partition boards are arranged on an annular cooling air duct, and the air duct partition boards divide the annular cooling air duct into corresponding cooling air ducts. Low-temperature hot exhaust gas produced after heat exchange carried out through the heat exchanger is respectively or simultaneously sent into the cooling air ducts to form a sealed air circulation which collects and sends the low-temperature hot exhaust gas which is obtained through heat exchange and cooling of the annular cooling high-temperature hot exhaust gas into the cooling air ducts. The system has the advantages that the low-temperature hot exhaust gas generated by sintering annular cooling waste heat power generation is recycled, heat energy waste and environment pollution phenomena caused by the exhausted low-temperature hot exhaust gas are eliminated, working environment of workers is substantially improved, sintering annular cooling waste heat power generation amount can be improved by 30% through collection and recycling of the exhaust gas in power generation, investment cost is significantly reduced, and electricity consumption in production is reduced by 26,880 thousand kw.h per day.

Description

Technical field [0001] The invention relates to the recovery and utilization of high-temperature sintering waste heat, in particular to a sintering waste heat power generation heat waste gas recycling system. Background technique [0002] In the current domestic production process of sintering waste heat power generation, the high-temperature hot exhaust gas collected from the ring cooler is converted into low-temperature hot exhaust gas after heat exchange and recovery through a heat exchanger, which is directly discharged through the external exhaust chimney. This method has the following disadvantages :1. Due to the limited heat exchange capacity of the heat exchanger, after the high-temperature hot exhaust gas collected from the annular cooler passes through the heat exchanger, a large amount of heat is carried into the atmosphere with the low-temperature hot exhaust gas discharged outside, which not only causes a waste of energy, but also Causes serious heat pollution to th...

AI Technical Summary

Problems solved by technology

[0002] At present, in the domestic production process of sintering waste heat power generation, the high-temperature hot exhaust gas collected from the annular cooler passes through the heat exchanger for heat exchange and recovery, and then becomes low-temperature hot exhaust gas, which is directly discharged through the external chimney. This method has the following disadvantages : 1. Due to the limited heat exchange capacity of the exchanger, after the high-temperature hot exhaust gas collected from the annular cooler passes through the heat exchanger, a large amount of heat is brought into the atmosphere along with the low-temperature hot exhaust gas discharged outside, which not only causes waste of energy, but also Cause serious heat pollution to the surrounding environment; 2. A large amount of dust generated during the ring-cooled blast cooling process of the sintering production process enters the heat exchanger along with the high-temperature hot exhaust gas, and then is directly discharged to the atmosphere combined with the low-temperature hot exhaust gas, which is harmful to the ring-cooled production area. Even the entire environment brings huge dust pollution; 3. As far as the sintering production process requires a large amount of cooling air volume, a large amount of low-temperature hot exhaust gas is directly discharged outside the annular cooling area, which directly causes waste of air volume

Images