Waste gas recycling system for organic waste biological drying process

Abstract

The invention discloses a waste gas recycling system for an organic waste biological drying process, which comprises a heat exchange tower body, the upper part of the heat exchange tower body is provided with a waste gas inlet, the lower part of the heat exchange tower body is provided with a waste gas outlet, and the waste gas outlet is provided with a deodorizer; a fresh air outlet is formed inthe upper portion of the heat exchange tower body, a fresh air inlet is formed in the lower portion of the heat exchange tower body, multiple heat exchange pipes are arranged in the heat exchange tower body, the bottom end is connected with the fresh air inlet, and the top end is connected with the fresh air outlet, the waste gas inlet is communicated with a gas outlet of the drying reactor, the fresh air outlet is communicated with a gas inlet, waste gas in the drying reactor flows from the tower top to the tower bottom for deodorization and then is discharged, fresh air flows from the towerbottom to the tower top through the heat exchange pipe for heat exchange, and gas in the drying reactor can be updated at any time and heat can be recycled. According to the system, automatic heat energy recycling is achieved, meanwhile, air pollution generated in the waste gas emission process is effectively avoided, and possibility is provided for energy-saving and resourceful treatment of high-temperature waste gas.

Description

technical field [0001] The invention relates to the technical field of environmental protection treatment, in particular to a waste gas recovery and utilization system used in the biological drying process of organic waste. Background technique [0002] Biological drying is an important means of dealing with urban organic waste, also known as biological drying and biological stabilization. Traditional biological drying was first proposed by Jewell et al. of Cornell University in the United States in 1984 when they studied the operating parameters of cow dung biological drying, and defined it as the use of biothermal energy generated by the degradation of organic matter during microbial high-temperature aerobic fermentation. A drying treatment process that promotes water evaporation through process control means to achieve rapid water removal. [0003] Biological drying includes the following two points: (1) The biological drying reaction occurs inside the reactor; (2) In th...

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Problems solved by technology

[0009] In the heat energy recovery of biological drying exhaust gas, more and thinner exchange tubes are required to improve the heat exchange efficiency, and the dust particles in the exhaust gas will adsorb and block the tubes; in non-cold temperatures, the temperature of the exhaust gas is 50-60 degrees, and the temperature difference is small If the airflow is too fast, the exchange will not be obvious; if dust is removed by spraying, it is also easy to reduce the internal air temperature and affect the temperature exchange

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