Waste gas combustion furnace and waste heat recovery method thereof

Abstract

The invention provides a waste gas combustion furnace and a waste heat recovery method thereof. The waste gas combustion furnace comprises a fresh air low-temperature heat exchanger, a waste gas high-temperature heat exchanger, a fresh air high-temperature heat exchanger, a waste gas incineration cracking furnace connected with the fresh air high-temperature heat exchanger, and a combustion engine, wherein waste gas in the waste gas high-temperature heat exchanger is output to the combustion engine through a pipeline, and the combustion engine outputs heat to the waste gas incineration cracking furnace. According to the waste gas combustion furnace and the waste heat recovery method thereof, waste gas is subjected to multi-stage heat exchange and then is cracked into carbon dioxide and water in the waste gas incineration cracking furnace to be discharged, heat of high-temperature gas generated in the cracking process is reused for preheating new entry waste gas, and fuel consumption required by temperature rise of the waste gas is reduced; the heat of the high-temperature gas generated in the cracking process is also used for heating fresh air through the multi-stage heat exchangers, the high-temperature fresh air can be output to a drying oven, and therefore the energy utilization efficiency is further improved, and the environmental pollution caused by the high-temperature waste gas is avoided.

Description

technical field [0001] The invention relates to the technical field of waste gas utilization, in particular to a waste gas combustion furnace and a waste heat recovery method. Background technique [0002] Volatile organic compounds (VOCs) are a type of organic pollutants that are ubiquitous in the air and have a complex composition. In my country, VOCs volatile organic compounds refer to those with a saturated vapor pressure greater than 70 Pa at normal temperature and a boiling point at 260 Pa at normal pressure. Organic compounds below ℃. Its main components are hydrocarbons, sulfides, ammonia, etc. Its pollution is mainly manifested in two aspects. On the one hand, most VOCs have toxicological characteristics and endanger human health. Organic waste gas is a pollutant harmful to human health. It is related to NO in the atmosphere. 2 The reaction produces O 3 , can form photochemical smog, and emit into the air along with peculiar smell and stench, which can stimulate h...

AI Technical Summary

Problems solved by technology

[0003] However, in production practice, it is found that during the process of exhaust gas being discharged into the atmosphere after treatment, the purified gas must pass through a heat exchanger to take away a large amount of heat, resulting in a high temperature of the exhaust gas when it is discharged, resulting in heat loss. , did not fundamentally achieve energy saving, and the waste gas containing a lot of heat still has a great impact on the environment

Images