For the sulfur dioxide emissions from the flue gas in the sulfur recovery units associated with current natural gas purification plants, is the standard 960 or 400?
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**In 2015, the Emission Standards for Pollutants from the Petroleum Refining Industry (GB31570-2015) were issued. New enterprises were required to comply with these standards starting from July 1, 2015, while existing enterprises had to do so starting from July 1, 2017. The control of water and air pollutant emissions was to be carried out in accordance with the provisions of these standards; thus, the relevant regulations set out in the Comprehensive Wastewater Discharge Standards (GB 8978-1996), the Comprehensive Air Pollutant Discharge Standards (GB 16297-1996), and the Emission Standards for Air Pollutants from Industrial Furnaces and Kilns (GB9078-1996) were no longer applicable. The new standard defines the petroleum refining industry. The new standard sets the limit for sulfur dioxide at 400, and 100 in special areas. However, the treatment plants are still using the 1996 standard of 960; I wonder why the 400 standard is not being applied. Does the petroleum refining industry not include natural gas purification units? First of all, I would like to thank all the enthusiastic sea friends; I hope everyone can share their opinions
400. It might become stricter in the future; estimated at 100.
I’m puzzled as to whether it is still the 960 standard that is being applied at China’s largest sulfur removal plant in reality. Does the petroleum refining industry not include natural gas purification units?
No way, I remember that the Sinopec Dazhou Natural Gas Purification Plant has already reached 400. A few years ago, the CNPC Yunnan refinery was designed with a target of 100.
We normally keep it at no more than 80, with the actual value being around 50!
No. I worked there from 2017 until April this year. During peak production periods, the workshop’s limit for sulfur dioxide was set at 500, but in practice that limit was actually 960. However, in some processing units, the exhaust gas from sulfur liquefaction degassing was directed from the tail furnace to the Claus furnace, and this approach proved effective, with the sulfur dioxide levels in the flue gas ranging from 200 to over 300
It’s unclear what the acid gas load and concentration are over there; it should be on a small scale
Around 70% load, 70% concentration, and a production volume of 60,000 – that’s considered low for natural gas...
Because at that time, the State Council granted the purification plant a privilege to discharge at a controlled rate.