Device and method for treating organic waste gas with large airflow and low concentration

Abstract

The invention belongs to the field of organic waste gas treatment and particularly relates to a device and a method for treating organic waste gas with large airflow and low concentration. The devicecomprises a purification system and a treatment system, wherein the purification system comprises a filter, a molecular sieve rotating wheel and an exhaust fan which are connected sequentially througha pipe, and further comprises a heat exchanger; the treatment system comprises a surface air cooler, an adsorption fan I, activated carbon adsorption beds, an adsorption fan II, a condensing unit, anonline oxygen content analysis device and a heater which are connected sequentially through a pipe; the condensing unit comprises a condenser and a recovered liquid storage tank. By means of characteristics of molecular sieve rotating wheel equipment, the waste gas with large airflow and low concentration is concentrated and changed into waste gas with small airflow and medium-high concentration;the treatment system adopts the activated carbon adsorption-nitrogen adsorption recovery technology for recovery and treatment, and the organic solvent is recovered while the organic waste gas is treated. Tail gas is discharged up to standard, recovery efficiency is high, investment cost is low, small area is occupied, and resource recycling is realized.

Description

technical field [0001] The invention belongs to the field of organic waste gas treatment, and in particular relates to a device and method for treating organic waste gas with large air volume and low concentration. Background technique [0002] With the increasingly severe air pollution, the state has promulgated more and more stringent environmental protection requirements to strictly limit the concentration of tail gas emissions, which puts forward governance requirements for those enterprises with large air volume and low concentration. At present, for the treatment of large air volume and low concentration of organic waste gas, activated carbon adsorption, concentration and combined oxidation technology is often used for treatment. This method has problems such as large equipment investment, large floor area, high operating cost, and low purification efficiency, which limits the application of activated carbon adsorption and concentration technology. In addition, the us...

AI Technical Summary

Problems solved by technology

This method has problems such as large equipment investment, large floor area, high operating cost, and low purification efficiency, which limits the application of activated carbon adsorption and concentration technology.

In addition, the use of oxidation treatment technology for organic waste gas with a single component and recycling value not only causes carbon emissions, but also runs counter to the idea of ​​circular economy in my country.

However, the traditional activated carbon adsorption purification technology cannot guarantee the discharge of tail gas up to the standard. In order to ensure the discharge of tail gas up to the standard, most projects adopt secondary or tertiary adsorption for treatment. This method not only has the disadvantages of high investment cost and large floor space, but also The process is complicated, there are many control points, and the operating cost is high, especially for the treatment of large air volume and low concentration.

Images