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A mdea regenerated acid gas desulfurization cycle regeneration process
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Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology for recycling and regenerating acid, applied in gas fuel, petroleum industry, separation of dispersed particles, etc., can solve the problems of high labor intensity, high operating cost, limited scope of use, etc., to improve system safety, improve use efficiency, The effect of balancing costs
Active Publication Date: 2017-12-12
SICHUAN HENGRI GAS ENG CO LTD
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[0006] In order to increase the sulfur capacity of the desulfurizer, the existing purification process generally needs to prolong the operation cycle, and needs to adopt a multi-tower series / parallel process. The desulfurization equipment is huge, the labor intensity is high, and the regeneration cycle of the desulfurizer cannot be realized. Incurred huge operating costs
Therefore, the application range of dry desulfurization is greatly limited, and it is generally suitable for occasions with low sulfur content in the gas
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specific Embodiment approach
[0030] Such as figure 1 As shown, a MDEA regenerated acid gas desulfurization process includes a desulfurization tower 1, a desulfurization tower 2 2, an acid gas separator 3, a liquid-sealed reflux pump 4, a pneumatic valve 5-16, a manual valve 17, a liquid level sensor 18, Pressure sensor 19.
[0031] The amine liquid rich in acid gas is stripped by the amine liquid regeneration tower, cooled by the acid gas cooler, and enters the acid gas separator 3, and the acid gas in the gas phase enters the first desulfurization tower 1 and the second desulfurization tower 2 for desulfurization, and the desulfurization tower One 1 and desulfurization tower two 2 can realize the desulfurization of the two towers in series or parallel through the connected pipeline and valve opening and closing. When the amount of sour gas is small, the desulfurization of single tower can be switched.
Embodiment 1
[0033] Take desulfurization tower one 1 in the desulfurization state switched to the regeneration state, and desulfurization tower two 2 enter the desulfurization state after regeneration as an example for illustration.
[0034] The specific implementation method of desulfurization and regeneration state switching of desulfurization tower 1 and desulfurization tower 2 is as follows:
[0035] Close the pneumatic valves 8, 11, 12, 13, 16, open the pneumatic valves 7, 10, 14, the incoming gas from the instrument air system is adjusted through the pneumatic valve 7, and then enters the desulfurization tower-1 through the valve 10 for oxidation and regeneration. Enter the vent pipe through the valve 14 to discharge, and realize the regeneration cycle of the desulfurization tower-1. When the desulfurization tower 2 is switched to the desulfurization state, the pneumatic valves 9 and 15 are opened, and the acid gas enters the desulfurization tower 2 through the valve 9 for desulfuriz...
Embodiment 2
[0039] The specific implementation method of simultaneous desulfurization of desulfurization tower one and desulfurization tower two is:
[0040] Close start valves 7, 10, 11, 12, 13, open pneumatic valves 8, 9, 14, 15, other settings are as described in Example 1.
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Abstract
The invention relates to the field of natural gas purification, in particular to a MDEA regenerated acid gas desulfurization cycle regeneration process. After the amine liquid rich in acid gas is stripped by the amine liquid regeneration tower, it is cooled by the acid gas cooler, and then enters the acid gas separator for separation. ; The gas-phase acid gas separated from the acid gas separator enters the desulfurization tower (1) and the desulfurization tower (2) for desulfurization, and the desulfurization tower (1) and the desulfurization tower (2) are connected in series or in parallel; through the instrument air system Blow gas to desulfurization tower (1) and desulfurization tower (2) to regenerate the desulfurization tower. The invention realizes the switching of the two towers and the cyclic regeneration of the desulfurizing agent. The cyclic regeneration of the desulfurizing agent can greatly improve the use efficiency of the desulfurizing agent, and the desulfurizing agent can be used in a more economical and efficient desulfurizing agent.
Description
technical field [0001] The invention relates to the field of natural gas purification, in particular to an MDEA regenerated acid gas desulfurization cycle regeneration process. Background technique [0002] As the society pays more and more attention to environmental protection, the effective control of the emission of sulfur-containing waste gas has become a part of the national environmental planning. In the natural gas purification plant, after the sulfur-containing natural gas is deacidified by alcohol amine (MDEA), the acid gas discharged from the regeneration tower of the rich alcohol amine solution needs to be discharged after removing sulfide. Dry desulfurization is a common process for acid gas treatment. It has a high degree of purification and can remove organic sulfur. However, the dry desulfurizer may not be regenerated or is very difficult to regenerate, and the sulfur capacity is limited. Typical dry desulfurization schemes mainly include: [0003] (1) Iron ...
Claims
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