New technology for treating industrial volatile organic chemicals (VOCs) waste gas

Abstract

The invention relates to a new technology for treating industrial volatile organic chemicals (VOCs) waste gas. The process of the technology comprises the steps of enabling the VOCs waste gas to enter an absorption tower and to be in reverse contact with microemulsion coming from an absorption liquid storage tank so as to remove part of VOCs by means of absorption; after that, enabling the waste gas to enter an adsorbing tower and to be in contact with activated carbon in the tower so as to further remove the VOCs by means of adsorption, and then discharging from the upper part of the absorbing tower; when the activated carbon of the adsorbing tower is saturate, stopping the filling of the waste gas, and enabling the waste gas to enter a standby adsorbing tower for treating; filling the bottom of the adsorbing tower with steam for desorbing the activated carbon, and enabling the desorbed waste gas and steam to enter the absorption tower for treating; adopting the same treatment method after activated carbon of the standby absorbing tower is saturate; enabling absorption liquid of the absorption tower to enter an absorption liquid regenerator for treating after the absorption liquid is saturate, enabling the regenerated absorption liquid to enter the absorption liquid storage tank for recycling, enabling organic matters generated by desorbing to enter a recovery storage tank, and recycling or burning the organic matters according to recovery values. The whole technology is simple and easy to operate, high in treatment rate, fewer in needed equipment, low in energy consumption and free from secondary pollution, thus having very good market application prospect.

Description

Technical field [0001] The invention relates to the field of organic waste gas treatment, in particular to a new process for treating industrial VOCs waste gas. Background technique [0002] Smog is the focus of current air pollution control, and the main culprit of smog is PM 2.5 Emissions, and VOCs as PM 2.5 The main precursors of, the harm it causes cannot be ignored. In my country, VOCs (volatile organic compounds) refer to organic compounds with saturated vapor pressure greater than 70 Pa at normal temperature and boiling point below 260°C at normal pressure, or with a vapor pressure greater than or equal to 10 Pa at 20°C. All volatile organic compounds. my country’s current total emissions of VOCs are large. VOCs will inevitably be generated in various occasions where organic solvents are used, such as painting, printing, adhesives, pharmaceuticals, plastics, rubber, petroleum and other processing and production sites. Although as the country pays more attention to VOCs, ...

AI Technical Summary

Problems solved by technology

Although with the strengthening of the country's emphasis on VOCs, treatment methods for VOCs have been successfully developed, and the corresponding treatment efficiency and treatment capacity have also increased year by year. Among them, absorption method, adsorption method, condensation method, catalytic method, combustion method And biological methods are methods with market application prospects at present, but these methods have problems such as single application form, inconvenient use and management, unqualified treatment efficiency and secondary pollution. Domestically, they can really meet the VOCs waste gas treatment requirements of major enterprises and are environmentally friendly. The practical VOCs treatment process is still in a blank stage, and with the strengthening of government supervision and the improvement of standards in various industries, it has become a top priority to find an environmentally friendly and effective VOCs treatment method

Images