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Compound liquid desulfurizing agent and application thereof

A desulfurizer and liquid mixing technology, applied in gas fuel, gas treatment, combustible gas purification, etc., can solve the problems of low sulfur capacity, easy degradation, slow reaction rate, etc., and achieve the effect of high selective absorption and fast absorption.

Inactive Publication Date: 2016-06-15
江苏大海能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although various alkanolamines have their own advantages in absorbing hydrogen sulfide, for example, alkanolamines such as MEA and DEA, which are mainly used in industry at present, have problems such as strong corrosion, easy degradation and deterioration, easy foaming, and high energy consumption for regeneration. MDEA decarburization solvent can overcome the shortcomings of the above-mentioned primary and secondary amines, but the tertiary amine properties of MDEA lead to slow reaction rate with organic sulfur and low sulfur capacity

Method used

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  • Compound liquid desulfurizing agent and application thereof
  • Compound liquid desulfurizing agent and application thereof
  • Compound liquid desulfurizing agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A compound liquid desulfurizer, comprising the following raw materials in weight percentage: 45% of hindered amine absorbent (weight ratio of aminoethoxyethanol to methyldiethanolamine 5:1), 4% of activator (ethylene glycol mono Ethyl ether and ethylene glycol dimethyl ether weight ratio 1:1), defoamer (methyl silicone oil) 0.1%, pH corrosion inhibitor 2.9% (2-amino-2-methyl-1-propanol and Na 2 CO 3 / NaHCO 3 The weight ratio is 5:1) and the balance of water. After dissolving each raw material in water, stir evenly to obtain the compound liquid desulfurizer, which is marked as CCJ-3# desulfurizer.

[0032] Test experiment: The CCJ-3# desulfurizer obtained in Example 1 is used to remove high-sulfur gas, at 40°C, normal pressure -70Mpa, CCJ-3# desulfurizer volume 500ml, gas-liquid ratio 1:300(m 3 :m 3 ) under the condition of using figure 1 The device and process remove sulfur in high-sulfur gas, and CH in high-sulfur gas 4 90%, H 2 S concentration 5%, organic mercap...

Embodiment 2

[0038] A compound liquid desulfurizer, comprising the following raw materials in weight percentage: 45% of hindered amine absorbent (aminoethoxyethanol), 7% of activator (ethylene glycol monoethyl ether and aminoethylpiperazine weight ratio 1 :3), defoamer (methyl silicone oil) 0.1%, pH corrosion inhibitor 1.9% (2-amino-2-ethyl-1,3-propanediol and sodium borate / boric acid weight ratio 6:1) and the balance water, each raw material is dissolved in water, and stirred evenly to obtain the compound liquid desulfurizer, marked as CCJ-4# desulfurizer.

[0039] Test experiment: The CCJ-4# desulfurizer obtained in Example 2 is used to remove high-sulfur and high-carbon natural gas. At 40°C, 4.8-7.2Mpa, the volume of CCJ-4# desulfurizer is 500ml, and the gas-liquid ratio is 1:300- 600(m 3 :m 3 ) under the condition of using figure 2 The device and process remove sulfur in high-sulfur and high-carbon natural gas, and CH in high-sulfur gas 4 90%, CO 2 3.8%, H 2 S concentration 5.7%...

Embodiment 3

[0045] A compound liquid desulfurizer, comprising the following raw materials in weight percentage: 45% of hindered amine absorbent (aminoethoxyethanol), 8% of activator (ethylene glycol monoethyl ether and N-hydroxyethylpiperazine weight Ratio 1:2), defoamer (methyl silicone oil) 0.1%, pH corrosion inhibitor 3.5% (weight ratio of butyl ethanolamine to sodium borate / boric acid 5:1) and the rest of water, after the raw materials are dissolved in water , and stir evenly to prepare the CCJ-2# desulfurizer described in the present invention.

[0046] Test experiment: The CCJ-2# desulfurizer obtained in Example 3 is used to remove high-sulfur and high-carbon natural gas. At 40°C, 4.8-7.2Mpa, the volume of CCJ-4# desulfurizer is 5m 3 , gas-liquid ratio 1:350-600(m 3 :m 3 ) under the condition of using figure 2 The device and process remove sulfur in high-sulfur and high-carbon natural gas, and CH in high-sulfur gas 4 90%, CO 2 3.8%, H 2 S concentration 5.7%, organic sulfur 37...

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Abstract

The invention discloses a compound liquid desulfurizing agent and application thereof. The compound liquid desulfurizing agent is prepared from the following raw materials in percentage by weight: 40%-45% of a steric hindrance amine absorbent, 0.3%-10% of an activating agent, 0.01%-0.2% of a de-foaming agent, 2%-5% of a pH corrosion inhibitor and the balance of water. After being dissolved into the water, the raw materials are uniformly mixed to obtain the compound liquid desulfurizing agent. The steric hindrance amine absorbent is any one of MDEA, TBEE, TBE, TBP and TBIPE, or a mixture formed by two or more thereof at any ratio. The compound liquid desulfurizing agent disclosed by the invention is mainly used for removing organic sulfur and inorganic sulfur in gas including natural gas, coal gas, marsh gas, industrial waste gas, refinery gas and the like and has relatively high selective absorption and rapid absorption capabilities; the compound liquid desulfurizing agent particularly can be used for removing high-concentration organic sulfur and can be used for removing the organic sulfur in the gas to be lower than 16g / m<3>, so that the desulfurizing effect is remarkable, production equipment can be effectively protected, and the loss and maintenance cost are reduced.

Description

technical field [0001] The invention relates to a compound liquid desulfurizer and its application, in particular to a compound liquid desulfurizer containing hindered amine absorbent, which is mainly used for removing natural gas, coal gas, biogas, industrial waste gas, refinery gas and other gases Medium and high concentration organic sulfur belongs to the field of gas purification. Background technique [0002] Hydrogen sulfide, CO2 and organic sulfide contained in natural gas, coal gas, biogas, industrial waste gas and refinery gas can generally be collectively referred to as acid components, and the organic sulfide mainly includes carbonyl sulfide, carbon disulfide, and sulfur with different carbon numbers Sulfides such as alcohols and thioethers. A large number of sulfide components present in oil and natural gas will not only cause corrosion of equipment and pipelines in the process of mining, processing, storage and transportation, but also cause environmental pollu...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/48C10L3/10C10K1/10
CPCB01D53/78B01D53/48B01D2252/204B01D2252/60B01D2252/602B01D2257/306B01D2258/0283B01D2258/05C10K1/004C10K1/10C10L3/103
Inventor 李春虎黄黎明陈东
Owner 江苏大海能源科技有限公司
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