Method for finely removing hydrogen sulfide from natural gas at normal temperature

Abstract

The invention discloses a method for finely removing hydrogen sulfide from natural gas at a normal temperature. The method adopts the following technical scheme: the natural gas enters a fine desulfurizing tower loaded with activated-carbon fine desulfurizing agent after the processes of drying and gas-water separation, so that H2S in the gas is removed under the effect of the desulfurizing agent; the fine desulfurizing agent is filled in a two-layer or multi-layer manner; the total height-to-diameter ratio of a bed layer is 1.5 to 4.0, the temperature is between normal temperature and 150 DEG C, and the pressure is between normal pressure and 2.5MPa; and through the measurement of a sulfur meter, when the contents of H2S in the natural gas reach 5mg / Nm3 after desulfurization through the desulfurizing tower, the desulfurizing process is completed. The desulfurizing agent uses particles or formed activated carbon as carriers of an activated component (i.e. CuO), and the contents of CuOin the desulfurizing agent are 2Wt% to 9Wt%; and the radial crushing strength is larger than or equal to 60N / cm, the bulk density is 0.5kg / I to 0.7kg / I, the specific surface is larger than 140m2 / g, and the specific pore volume is 0.4ml / g to 0.8ml / g. Copper-loaded activated carbon is adopted as the desulfurizing agent for desulfurization, so that the special surface structure of the activated-carbon material is utilized for H2S purification through adsorption and catalytic oxidation.

Description

technical field [0001] The invention belongs to natural gas purification treatment technology, in particular to a normal temperature desulfurization method of natural gas. Background technique [0002] As a green and clean energy, natural gas has been paid more and more attention to its development and utilization, and all countries have corresponding purification standards for the quality of natural gas. To develop the natural gas industry, it is necessary to study and develop natural gas purification technology to solve the problems of natural gas transportation, storage and harmless utilization. Desulfurization generally adopts dry desulfurization. Dry methods include iron oxide method, zinc oxide method, activated carbon method, molecular sieve method, etc. Dry method is suitable for low-sulfur gas treatment. It has simple process, convenient operation, high desulfurization accuracy and low energy consumption. And is widely used. Because iron oxide desulfurizes accor...

AI Technical Summary

Problems solved by technology

Due to the low adsorption and reaction rate and low sulfur capacity of traditional activated carbon desulfurization, it is difficult to meet the requirements of industrial desulfurization