Compound desulfurizing agent and method for deeply desulfurizing sulfur-containing gas

A desulfurizer and gas technology, applied in the field of deep desulfurization of sulfur-containing gas, can solve the problems of low catalyst timeliness, high anti-corrosion cost, large pipeline investment, etc., and achieve the effect of low absorption rate, strong adaptability, and direct emission.

Active Publication Date: 2018-07-24
HEBEI REFINING TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process has the advantages of high desulfurization efficiency and low operating cost, but the catalyst has low timeliness and requires frequent replacement of the catalyst. Due to the by-product sulfuric acid, the pipeline investment is large and the anti-corrosion cost is high.

Method used

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  • Compound desulfurizing agent and method for deeply desulfurizing sulfur-containing gas
  • Compound desulfurizing agent and method for deeply desulfurizing sulfur-containing gas
  • Compound desulfurizing agent and method for deeply desulfurizing sulfur-containing gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] This embodiment provides a deep desulfurization method for sulfur-containing gas, wherein the sulfur-containing gas comes from the product of sulfur tail gas desulfurized by the SCOT process. The specific process of SCOT process desulfurization is carried out according to the above steps 1 to 5, and the specific process of deep desulfurization is carried out according to the above steps 6 to 8.

[0062] See Table 1 for specific process parameters of SCOT process desulfurization and deep desulfurization. Wherein, the component weight percent of the composite desulfurizer used in step 6 is: methyl sulfolane: 30%, MDEA: 20%, N-formylmorpholine: 35%, toluene: 10%, water: 5%.

[0063] The components of the sulfur hydrogenation tail gas obtained in step 2, the sulfur-containing gas obtained in step 5, and the desulfurized gas obtained by deep desulfurization of the sulfur-containing gas are shown in Table 2.

[0064] Table 1

[0065]

[0066]

[0067] Table 2

[0068...

experiment example 1

[0077] Composite desulfurizer used in Example 1 is compared with MDEA desulfurizer (30% MDEA aqueous solution) in the laboratory evaluation device for performance comparison, see Table 4 for specific comparison results.

[0078] Table 4

[0079]

[0080]

[0081] Note: The data in Table 4 are all measured under static absorption test conditions.

[0082] The comparison results in Table 4 show that the hydrogen sulfide removal effect of the composite desulfurizer is basically equivalent to that of the MDEA desulfurizer, but the removal rate of COS is 6.2 times that of the MDEA desulfurizer; It has a very large sulfur capacity, and its carbon dioxide slip rate is 18 percentage points higher than that of MDEA desulfurizer.

Embodiment 2

[0084] This embodiment provides a deep desulfurization method for sulfur-containing gas, wherein the sulfur-containing gas comes from the product of sulfur tail gas desulfurized by the SCOT process. The specific process of SCOT process desulfurization is carried out according to the above steps 1 to 5, and the specific process of deep desulfurization is carried out according to the above steps 6 to 8.

[0085] See Table 5 for specific process parameters of SCOT process desulfurization and deep desulfurization. Wherein, the component weight percent of the composite desulfurizer used in step 6 is: sulfolane: 20%, DIPA: 20%, N-methylpyrrolidone: 40%, naphthalene: 10%, water: 10%.

[0086] The components of the sulfur hydrogenation tail gas obtained in step 2, the sulfur-containing gas obtained in step 5, and the desulfurized gas obtained by deep desulfurization of the sulfur-containing gas are shown in Table 6.

[0087] table 5

[0088]

[0089]

[0090] Table 6

[0091]...

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Abstract

The invention provides a compound desulfurizing agent and a method for deeply desulfurizing sulfur-containing gas. The compound desulfurizing agent comprises 2-40 parts by weight of sulfone or sulfoxide, 2-30 parts by weight of organic amine desulfurizing agent, 0-20 parts of C6-C12 aromatic hydrocarbons and 5-90 parts by weight of reinforcing agent. The reinforcing agent selects from at least oneof n-formyl morpholine, N-methyl pyrrolidone, polyethylene glycol, triethylene glycol, tetraethylene glycol and propylene carbonate. The compound desulfurizing agent provided by the invention can realize the simultaneous deep removal of hydrogen sulfide in the sulfur-containing gas and organic sulfur components; the method for deeply desulfurizing the sulfur-containing gas by adopting the compound desulfurizing agent also has the advantages of being low in equipment renovation cost and low in running energy consumption.

Description

technical field [0001] The invention relates to deep desulfurization technology of sulfur-containing gas, in particular to a compound desulfurizer capable of simultaneously deep removal of hydrogen sulfide and organic sulfur components in sulfur tail gas and a method for deep desulfurization of sulfur-containing gas. Background technique [0002] The treatment effect of sulfur-containing tail gas has always been an important factor affecting the quality of exhaust gas. The usual practice is to desulfurize the sulfur-containing tail gas until the sulfur content is low to a certain extent, and then discharge it at high altitude in the form of sulfur-containing oxides through incineration. . Sulfur-containing tail gas refers to the sulfur-containing gas discharged from various processing units. The composition of the tail gas will be different due to different sources. The sulfur will be in the form of elemental sulfur, sulfide and organic sulfur (such as COS, CS 2 etc.), so t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14B01D53/86B01D53/90B01D5/00B01D53/00B01D53/48B01D53/50
CPCB01D5/0057B01D53/002B01D53/1425B01D53/1431B01D53/1468B01D53/1493B01D53/8603B01D53/8609B01D53/90B01D2251/202B01D2252/504B01D2257/302B01D2257/304B01D2257/306B01D2257/308B01D2258/02
Inventor 郝天臻赵亮宋华陈彦广高金森孙德欣李德忠
Owner HEBEI REFINING TECH CO LTD
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