Modified and sulfur-impregnated molecular sieve demercuration agent, and preparation method and special apparatus thereof

Abstract

The invention specifically discloses a modified and sulfur-impregnated molecular sieve demercuration agent, and a preparation method and a special apparatus thereof, belonging to the field of industrial production, especially to the field of treatment of Hg produced in production of oil gas. A sulfur-loaded molecular sieve with more excellent adsorptivity is prepared by changing carbonization and sulfur-impregnation conditions on the basis of conventional preparation processes for sulfur-loaded molecular sieves. According to results of comparison of the general physical properties of a carbon molecular sieve and other industrial granular adsorbents, the carbon molecular sieve is different from zeolite-series molecular sieves of aluminosilicate crystals; the carbon molecular sieve is composed of crystalline carbon as active carbon does, so the physical properties of the carbon molecular sieve are substantially similar to the physical properties of active carbon; and the carbon molecular sieve has acid resistance, alkali resistance, chemical stability and poor combustion resistance. According to results of research on and comparison of the properties of overweight carriers, walnut shell carbon has high demercuration efficiency, can remove SO2 and NOx at the same time, presents good application prospects and has more excellent performance compared with other molecular sieves. Thus, the sulfur-loaded molecular sieve has improved mercury adsorption capability by changing the carbonization and sulfur-impregnation conditions.

Description

technical field [0001] The invention relates to the field of Hg treatment in industrial production, especially in the oil and gas production process, and specifically relates to a modified impregnated sulfur molecular sieve mercury removal agent, a preparation method and a special device thereof. Background technique [0002] According to investigations, mercury mainly comes from gas source rocks, volcanic magma, deep earth and symbiotic mercury mines, etc. It is a harmful substance that is ubiquitous in natural gas. Most of the natural gas in various gas fields contains trace metal element mercury and its compounds. After the natural gas is extracted from the ground, it is transported to the processing plant through the gathering and transportation pipeline for processing. The complex temperature and pressure conditions in this process make the mercury content in each processing device and its isolates different. Mercury entering the environment will cause mercury pollution...

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Problems solved by technology

The carrier is used as the carrier medium of the reaction substance, so that the reaction substance can be evenly distributed in it. Due to its porosity, the probability of contact between the reaction substance and mercury in natural gas is increased, but its adsorption of mercury is limited.

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