Full-temperature-range pressure-swing adsorption method for removing hydrogen sulfide from hydrogen rich gas source

A pressure swing adsorption method, pressure swing adsorption technology, applied in the direction of sulfur compounds, chemical instruments and methods, sulfur preparation/purification, etc., can solve the problem of large consumption of regeneration gas and heat, difficulty in matching adsorption time, water vapor recycling, etc. problems, to achieve long life of the adsorbent, reduce energy consumption and material consumption, and solve the effect of adsorption and regeneration

Active Publication Date: 2016-08-17
SICHUAN TECHAIRS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the regeneration temperature should be increased, and must be selected with H 2 S non-reactive inert heat carrier or steam needs to consume a lot of regeneration gas and heat, especially H 2 When S is easy to precipitate elemental sulfur on the surface of the adsorbent at high temperature, it needs a high temperature above 400°C to completely regenerate
If you choose general heat carrier nitrogen (N 2 ) or water vapor, t

Method used

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  • Full-temperature-range pressure-swing adsorption method for removing hydrogen sulfide from hydrogen rich gas source
  • Full-temperature-range pressure-swing adsorption method for removing hydrogen sulfide from hydrogen rich gas source
  • Full-temperature-range pressure-swing adsorption method for removing hydrogen sulfide from hydrogen rich gas source

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Embodiment 1

[0038] Such as figure 1 As shown, a full-temperature pressure swing adsorption method for removing hydrogen sulfide from a hydrogen-rich gas source includes the following steps:

[0039] A. Medium temperature pressure swing adsorption concentration process, the temperature is 120~150℃, H 2 Hydrogen-rich gas with an S concentration of 1-2% (volume ratio, the same below) enters the medium-temperature pressure swing adsorption concentration system through the inlet pipeline as raw material gas. The medium-temperature pressure swing adsorption concentration system adopts a 4-tower series process with alternating cycles Operation, the operating temperature of the adsorption is 120~150°C, vacuum desorption after the adsorption is completed, the medium temperature pressure swing adsorption concentration system divides the raw material gas into H 2 Intermediate gas with S content less than 1~10ppm and rich in H 2 Two parts of concentrated gas of S (≥10~25%);

[0040] B. product gas...

Embodiment 2

[0044] Such as figure 1 As shown, a full temperature range pressure swing adsorption (FTrPSA) method for removing hydrogen sulfide from a hydrogen-rich gas source includes the following steps:

[0045] A. Medium temperature pressure swing adsorption concentration process, the temperature is 80~110℃, H 2 The hydrogen-rich gas with an S concentration of 1-2% (volume ratio, the same below) enters the medium-temperature pressure swing adsorption system through the inlet pipe as the raw material gas. The medium-temperature pressure swing adsorption system adopts a 4-tower series process, and 1 tower is adsorbed. The remaining 3 towers are in regeneration stages such as evacuation, desorption, etc., alternate cycle operation, the operating temperature is 80 ~ 110 ℃, vacuum desorption after the adsorption is completed, the medium temperature pressure swing adsorption concentration system divides the raw material gas into H 2 Intermediate gas with S content less than 1~10ppm and ric...

Embodiment 3

[0050] Such as figure 2 As shown, a full temperature range pressure swing adsorption (FTrPSA) method for removing hydrogen sulfide from a hydrogen-rich gas source includes the following steps:

[0051] A. Medium-temperature pressure swing adsorption concentration process, the flow rate is greater than 10,000 to 20,000 standard cubic meters per hour, the temperature is 50-80 ° C, H 2 The hydrogen-rich gas with an S concentration of 10-15% enters the medium temperature pressure swing adsorption concentration system through the intake pipe as the raw material gas. The medium temperature pressure swing adsorption system adopts a 10-tower process, 3 towers are adsorbed, and the remaining 7 towers are in evacuation, desorption, etc. In the regeneration stage, the 3 towers in the adsorption process adopt a process of 1 tower in series and 2 towers in parallel, thereby realizing the alternate cycle operation of adsorption regeneration, the operating temperature is 50-80°C, vacuum des...

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Abstract

The invention discloses a full-temperature-range pressure-swing adsorption method for removing hydrogen sulfide from a hydrogen rich gas source and relates to the technical field of gas desulfurization and purification. According to the technical scheme of the invention, after the full-temperature-range pressure-swing adsorption and concentration process, most of H2S in hydrogen rich gas are removed, and then remaining H2S in hydrogen rich gas can be continuously and deeply removed through selecting the pressure-swing adsorption method or the one-time adsorption method. After that, the H2S-enriched desorbed gas is directly fed into a desulfurization and sulfur-production device, and the gas amount of the above gas is reduced by 80% compared with the gas amount of raw materials. Meanwhile, the circulation volume of the desulfurizing liquid is reduced, and the energy consumption of a machine pump is reduced at the same time. The desulfurization and sulfur-production device can adopt the sodium carbonate desulfurizing and sulfur-producing process or the Claus process, and H2S in the H2S-enriched desorbed gas is removed to be about 100 ppm. Elemental sulfur foams produced during the desulfurizing process are made into sulphur by means of a sulfur retrieving device.

Description

technical field [0001] The invention relates to the technical field of gas desulfurization and purification, and more specifically relates to a full temperature-range pressure swing adsorption method for removing hydrogen sulfide from a hydrogen-rich gas source. Background technique [0002] Hydrogen sulfide (H 2 S) It is a harmful impurity in natural gas, refinery gas, synthesis gas and other industrial gases. Its existence not only seriously threatens personal safety, but also causes corrosion of equipment and pipelines and catalyst poisoning, especially the large amount of hydrogen-rich dry gas produced by refining hydrogenation is often accompanied by H 2 S. The source of hydrogen required for hydrogenation is mostly recovered from hydrogen-containing dry gas for recycling, which can reduce the cost of hydrogenation and comprehensively utilize refinery dry gas. However, H in hydrogen-containing refinery dry gas 2 S, will poison the hydrogenation catalyst in the hydro...

Claims

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Application Information

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IPC IPC(8): C01B3/50C01B17/04
CPCC01B3/508C01B17/0404C01B2210/0021C01B2210/0064
Inventor 刘开莉陈运钟雨明蔡跃明
Owner SICHUAN TECHAIRS
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