Method for removing H2S in offshore oil production associated gas by utilizing seawater modified LO-CATII method

An associated gas removal technology, applied in separation methods, chemical instruments and methods, gas fuels, etc., can solve problems such as marine pollution, toxic desulfurization liquid, flammable floor space, etc., and achieve the effect of overcoming potential marine pollution

Inactive Publication Date: 2014-05-21
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies of the existing technology, a method is provided that can overcome the disadvantages of the conventional desulfurization method, such as potential pollution to the ocean, toxic desulfurization liquid, flammability, and large footprint, and can meet the requirements of limited volume of offshore oil production platforms and low temperature, low pressure, and high safety. Coefficient of process requirements, in line with the development trend of the blue ocean economy, the use of seawater modified LO-CAT II method to remove H from offshore oil production associated gas 2 S method

Method used

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  • Method for removing H2S in offshore oil production associated gas by utilizing seawater modified LO-CATII method
  • Method for removing H2S in offshore oil production associated gas by utilizing seawater modified LO-CATII method
  • Method for removing H2S in offshore oil production associated gas by utilizing seawater modified LO-CATII method

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Experimental program
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Effect test

Embodiment 1

[0020] (1) Measure fresh seawater in a 2L beaker and place it in a glass constant temperature water bath; (2) Weigh the complexing agent separately

[0021] m EDTA-2Na =0.945g, m HBDTA : 0.520, m 山梨糖醇 =0.07g, respectively added to beakers filled with seawater, and stirred continuously with a glass rod to dissolve completely; (3) Weigh Add in the above solution, after it is completely dissolved, measure its pH value to be acidic; (4) Slowly add anhydrous Na to the solution 2 CO 3 And keep stirring, when its pH=8, it will be made into seawater absorption liquid. Due to Fe 3+ It is unstable under alkaline conditions, therefore, the seawater absorption solution needs to be prepared immediately after use.

[0022] In addition, distilled water is used instead of seawater, and the distilled water absorption solution is prepared according to steps (1)-(4). The experimental conditions for desulfurization activity evaluation of the absorption liquid prepared by seawater and dist...

Embodiment 2

[0024] (1) Measure fresh seawater in a 2L beaker and place it in a glass constant temperature water bath; (2) Weigh the complexing agent m EDTA-2Na : 1.23g, m HEDTA : 0.38g, Yin 山梨糖醇 : 0.31g, respectively added to a beaker filled with seawater, and stirred with a glass rod to make it completely dissolved; (3) Weigh Add in the above solution, after it is completely dissolved, measure its pH value to be acidic; (4) Slowly add anhydrous Na to the solution 2 C0 3 And keep stirring, when its pH=8, it will be made into seawater absorption liquid. The experimental conditions for evaluating the desulfurization activity of the seawater absorption liquid are as follows: the volume flow rate of raw gas v=600ml / min, the initial pH value of the absorption liquid is 8, The excess air factor ε is 60. The desulfurization effect at different temperatures is as follows: figure 2 and image 3 shown. Depend on figure 2 and image 3 It can be seen that low temperature favors H 2 Rem...

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Abstract

The invention discloses a method for removing H2S in offshore oil production associated gas by utilizing seawater modified LO-CATII process. The method comprises the steps of leading simulated natural gas containing H2S into redox medium absorption liquid prepared by seawater in which a catalyst and a complexing agent are added, blowing a certain amount of air into the adsorption liquid, replacing part of absorption liquid to continue to desulfurize when the concentration of H2S at a reactor outlet exceeds an index. After the product sulfur in the replaced absorption liquid is filtered, the replaced absorption liquid can be recycled through air regeneration. The method has the advantages that the deficiencies that the conventional desulfurization method has hidden pollution to a sea, the desulfurization liquid is toxic and inflammable, the occupied area is large and the like can be overcome, the technological requirement on the limited volume of an offshore oil production platform and low temperature, low pressure and high-safety coefficients can be met, and the method can comply with the development trend of blue ocean economy.

Description

technical field [0001] The invention relates to a method for removing H in gas associated with oil production on an offshore drilling platform. 2 The new method of S, more specifically, is a seawater LO-CAT II desulfurization process formed by using the alkalinity of seawater and the action of "pH slow-release agent" combined with the modified LO-CAT II desulfurization process to remove associated H in gas and natural gas fields 2 S method. Background technique [0002] With the advent of the era of low-carbon economy, natural gas will overtake crude oil and coal and become the "chief energy source" in the primary energy consumption structure, entering a new era of development and utilization. From 2000 to 2008, my country's natural gas consumption increased from 2.45×10 10 m 3 increased to 8.07×10 １0 m 3 , and presents a rapid growth trend. However, compared with onshore natural gas, offshore natural gas development has disadvantages such as harsh environment, comple...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/86B01D53/52C10L3/10
Inventor 李春虎邢宁宁方光静冯丽娟卞俊杰王亮李子真
Owner OCEAN UNIV OF CHINA
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