Regeneration process of high temperature gas desulfurizer

A desulfurizer and gas technology, which is applied in the petroleum industry, combustible gas purification, sulfur preparation/purification, etc., can solve the problems of easy pulverization or sintering of desulfurizers, decreased desulfurization performance of desulfurizers, and low recovery rate of elemental sulfur, etc. Achieve the effect of improving operability, stable regeneration temperature and simplifying process

Inactive Publication Date: 2012-12-12
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0009] The invention is a high-temperature gas desulfurizer regeneration process, which aims to solve the problems of slow regeneration rate, low recovery rate of elemental sulfur, easy pulverization or sintering of the desulfurizer, and desulfurization performance of the desulfurizer after regeneration in the regeneration process of the iron oxide-based high-temperature gas desulfurizer etc., discloses a technical scheme for regenerating and recycling the sulfur in the iron oxide-based adsorbent after high-temperature desulfurization in the form of elemental sulfur, so that the activity of the desulfurizer can be restored and the desulfurization / regeneration process of the desulfurizer can be cyclically carried out

Method used

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  • Regeneration process of high temperature gas desulfurizer
  • Regeneration process of high temperature gas desulfurizer

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Experimental program
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Effect test

Embodiment approach 1

[0034] First, weigh 395 grams of dried steel mill red mud with an iron oxide content of more than 55%, add 75 grams of structural additive brick and tile soil, then add 25 grams of pore-forming agent carboxymethyl cellulose, and finally add additive graphite 5 grams, after grinding and mixing these components, add 1750ml of water and knead, the raw material after kneading is made into strips with an extruder, the diameter of the strips is φ2~3mm, the length of the strips is L3~5mm, after drying at room temperature, Dry in an oven at 120°C for 2 hours, and finally bake in a muffle furnace at 750°C for 5 hours to finally prepare an iron oxide-based high-temperature gas desulfurizer sample; the prepared iron oxide-based high-temperature gas desulfurizer sample is desulfurized and desulfurized. The conditions are that the inner diameter of the reactor is 20mm, the particle size of the desulfurizer is φ2mm, the length of the desulfurizer is L3mm, the filling volume is 10ml, the reac...

Embodiment approach 2

[0036] The desulfurized iron oxide high-temperature gas desulfurizer sample obtained from Embodiment 1 is directly regenerated in the desulfurization reactor, at a space velocity of 3000h -1 , atmospheric pressure, 20vol.%O prepared by a single gas mixture 2 / SO 2 and 80vol.%N 2 The composition of the regeneration gas enters from the bottom of the reactor, where O 2 / SO 2 The volume ratio is 1:100, and the sulfur dioxide concentration at the inlet and outlet of the desulfurizer reactor is tested at the regeneration temperature of 800°C. When the concentration of sulfur dioxide at the inlet and outlet is close, the regeneration is stopped, and the regeneration tail gas is cooled to 70°C in the sulfur recovery device during the regeneration process. Below, the elemental sulfur and the regeneration gas are separated, and a small amount of O is added to the regeneration tail gas 2 / SO 2 After the mixed gas is regenerated, the regeneration rate of the iron oxide-based high-tem...

Embodiment approach 3

[0038] The desulfurized iron oxide high-temperature gas desulfurizer sample obtained in Embodiment 1 is directly regenerated in the desulfurization reactor, at a temperature of 800 ° C, at normal pressure, and prepared by mixing a single gas with 20vol.%O 2 / SO 2 and 80vol.%N 2 The composition of the regeneration gas enters from the bottom of the reactor, where O 2 / SO 2 The volume ratio is 1:100, and the test is at 4000h -1 The sulfur dioxide concentration at the inlet and outlet of the desulfurizer reactor under the regeneration space velocity. When the inlet and outlet sulfur dioxide concentrations are close to each other, the regeneration is stopped. During the regeneration process, the regeneration tail gas is cooled to below 70°C in the sulfur recovery device, and the elemental sulfur and the regeneration gas are separated. At the same time, a small amount of O was added to the regeneration tail gas 2 / SO 2 After the mixed gas is recycled, 4000h -1 The regeneration...

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Abstract

The invention relates to a regeneration process of a high temperature gas desulfurizer, belonging to the field of preparation and use of gas desulfurizer. The invention is characterized in that by utilizing the regeneration heat-absorbing reaction of a ferric oxide based desulfurizer under an atmosphere containing sulfur dioxide, temperature runaway sintering of the desulfurizer caused by acute heat release of the regeneration reaction of the ferric oxide based desulfurizer under an atmosphere containing trace oxygen is avoided, thereby improving the regeneration reaction rate, recovering theelemental sulfur resource, realizing the desulfurizing / regeneration cycle process of the ferric oxide based desulfurizer, and simultaneously realizing cycle of the regeneration gas by introducing theregenerated gas into a regeneration reactor. The regeneration rate of the ferric oxide high temperature gas desulfurizer can reach more than 80%, and the regenerated products are all elemental sulfur. The invention has simple operation, stable desulfurizing performance of the regenerated desulfurizer and considerable application value, economic benefit and social benefit, and is developed mainly aiming at the ferric oxide based high temperature gas desulfurization and purification.

Description

technical field [0001] The invention relates to a high-temperature gas desulfurization agent regeneration process, which belongs to the field of gas desulfurization agent preparation and use, and relates to a method for recovering sulfur resources in the high-temperature gas desulfurization purification process, specifically an iron oxide-based adsorbent after high-temperature desulfurization The sulfur in the sulfur is regenerated and recycled in the form of elemental sulfur, and the activity of the desulfurizer can be restored and the desulfurization / regeneration process of the desulfurizer can be cycled. Background technique [0002] Advanced coal clean conversion and utilization technologies such as integrated gasification combined cycle (IGCC) power generation, molten carbonate fuel cell (MCFC) power generation, and double-gas coal-based polygeneration (DGCPG) production of alcohol ether fuel and power generation have significantly improved It is the development directi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/48C10K1/26C01B17/04
Inventor 上官炬赵瑞壮梁丽彤樊惠玲王秀兰沈芳苗茂谦米杰
Owner TAIYUAN UNIV OF TECH
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