Method for treating exhaust gas containing volatile hydrocarbon, and apparatus for practicing said method
A processing method, hydrocarbon technology, applied in gas processing, chemical instruments and methods, separation methods, etc.
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[0119] Examples of the present invention are listed below to describe the present invention in detail, but the present invention is not limited to the following first to third embodiments.
no. 1 Embodiment
[0120] "Example 1: An example of discharging to the atmosphere as clean air"
[0121] The first embodiment relates to an example of implementation of a method in which, as figure 1 As shown, it consists of adsorption towers (desorption towers) 7a, 7b filled with adsorbent, vacuum pump 4, air lines 8, 8a, 8b for purification, supply line 1 for exhaust gas, and return line 6 for uncondensed gas. The experimental device of the working standard (labor scale) formed by Etc. etc. is used to treat the volatile hydrocarbons contained in the exhaust gas. in addition, figure 1 The reference numerals 2a, 2b, 3a, 3b, 9, 9a, 9b represent electromagnetic valves, and the reference numeral 5 represents a gas-liquid separator.
[0122] In this first embodiment, as the medium-pore activated carbon (MPC) filled in the adsorption tower, the product with the trade name "GF-40" produced by Japan Nolit Co., Ltd. was used. The pores of the activated carbon are mainly formed by mesopores with a dia...
no. 2 Embodiment
[0137] "Example 2: Example of recovering high-purity nitrogen from polluted nitrogen"
[0138] The purpose of the second embodiment is to recover the contaminated nitrogen after foaming and even aeration treatment by nitrogen in order to improve the purity of the product obtained from the reaction layer in the petrochemical plant. In particular, the gas to be treated is a large amount of nitrogen contaminated with low-boiling-point activated carbon such as propane and propylene.
[0139] That is, the composition of the gas (contaminating nitrogen) is as follows.
[0140] N 2 (Nitrogen) 88%
[0141] C 3 (propane) 2%
[0142] C 3 (Propylene) 5%
[0143] C 4 (butane) 1%
[0144] C 5 (pentane) 1%
[0145] C 6 (Hexene) 3%
[0146] The adsorbent used in the 2nd embodiment is medium-pore activated carbon (trade name produced by Japan Noritto Co.: GF40-45: particle) and B-type hydrophobic silica gel (trade name produced by Fuji Silysia Chemical Co., Ltd.: キャリアクト Q-6 : 10-...
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