Cold drum or crude benzene section waste gas treatment device and intelligent pressure maintaining and oxygen control method

Abstract

The invention provides a cold drum or crude benzene section waste gas treatment device and a pressure maintaining oxygen control method. The cold drum or crude benzene section waste gas treatment device includes a controller, a gas compressor, a material storage tank, a collection and pressure storage tank, a treatment tank, pressure sensors and an oxygen concentration detector, the collection andpressure storage tank communicates with the material storage tank through a first pipeline, the first pipeline is provided with the gas compressor connected with the controller, the collection and pressure storage tank collects waste gas generated by the material storage tank for storage and reservation, the collection and pressure storage tank communicates with the material storage tank for pumping air from the material storage tank or pressure supplying and air returning through a second pipeline, the treatment tank communicates with the material storage tank through a third pipeline, the first, second and third pipelines are provided with valves connected with the controller correspondingly, the material storage tank and the collection and pressure storage tank are provided with the pressure sensors connected with the controller, the controller can intelligently control opening and closing of the valves and the gas compressor according to real-time collected data, and the purposesof intelligent pressure maintaining and oxygen control are achieved.

Description

technical field [0001] The invention relates to a waste gas treatment technology, in particular to a waste gas treatment device in a cold drum or crude benzene section and an intelligent pressure maintaining and oxygen control method. Background technique [0002] The cold drum and crude benzene sections of chemical companies will collect waste gas from the material tank and other collection points for centralized treatment. The material tank itself is sealed. When the material in the material tank is out of the warehouse, the upper chamber of the tank will generate negative pressure. The tank body is easily damaged. At the same time, after the exhaust gas in the upper chamber is collected, the material tank will also lose pressure and cause problems. At this stage, there are two main solutions to maintain the pressure balance of the storage tank (hereinafter referred to as pressure maintenance): [0003] 1. Nitrogen-filling and pressure-holding method: the disadvantage is t...

AI Technical Summary

Problems solved by technology

[0003] 1. Nitrogen filling and pressure keeping method: the disadvantage is that the nitrogen content of the gas in other associated systems will increase, which will affect the calorific value of the gas

[0004] 2. Steam filling and pressure keeping method: the disadvantage is that after entering the steam, the steam is easy to condense and produce waste water

This will lead to an increase in water content in tar and benzene, which will affect product quality and increase the burden of wastewater treatment

[0005] At the same time, after the exhaust gas is collected, it is necessary to control the oxygen concentration of the exhaust gas (hereinafter referred to as oxygen control) to prevent the combustion and explosion problems caused by the high oxygen concentration in the subsequent exhaust gas treatment. At this stage, it is introduced to other systems by shutting down when the oxygen concentration exceeds the standard. Pipeline valves to prevent excessive oxygen from entering other systems and avoid potential safety hazards. The disadvantage is that after closing the pipeline valves, the exhaust gas cannot be processed in the next step. Generally, the exhaust gas containing oxygen exceeding the standard is directly discharged into the atmosphere, causing air pollution. Another method is to inject inert gas, such as general nitrogen filling to control the oxygen content. The addition of a large amount of nitrogen will increase the difficulty of the subsequent waste gas treatment process.

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