Is desulfurization needed in this case? ? ?
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A natural gas intercooling and recovery unit with a production capacity of 250,000 cubic meters per day; the gas contains 65 PPM of hydrogen sulfide, with a total sulfur content of 132 mg/m³ (under testing conditions of 19 degrees Celsius and 56% humidity). The mole percentages of the various components are as follows: N2 – 22%, CH4 – 69.619%, CO2 – 3.038%, C2H6 – 7.631%, C3H8 – 8.309%, i-C4H10 – 2.049%, n-C4H10 – 3.818%, i-C5H12 – 1.126%, n-C5H12 – 1.126%, C6–C10 – 10.489%, C6–C20 – 20.19%, C6–C30 – 45.11%, C7 – 16%. The density is 0.867, and the average molecular weight is 25.134. The proportion of air is 2.43%. Is a desulfurization unit necessary? The commonly used Chun’an method for desulfurization seems inappropriate in this case. If desulfurization isn’t required, are there any temporary measures that can be taken? ? ?
Dry desulfurization can be used; two desulfurization towers can be installed before the dewatering unit, and the desulfurizing agent needs to be replaced every 3–6 months. The main goal is to reduce H2S levels to below 20 mg/m3; this results in minimal corrosion damage to the facilities, and it also meets the requirements for **Category II natural gas.
**What are the requirements for the quality of Class II natural gas?/
It can be found in GB17820-1999 \"Natural Gas\"; the link to this standard on Hainchuan is: http://bbs.hcbbs.com/viewthread.php?tid=344413&highlight=GB17820. However, there is already a 2006 version of this standard; if anyone has it, they can post it on Haichuan and include the link