Purification device and purification method of organic amine desulfurization agent in organic amine desulfurization process
A technology of desulfurization process and organic amine method, which is applied to the purification device and purification field of organic amine desulfurizer in the organic amine desulfurization process, which can solve the problems of poor purification effect and achieve the effect of reducing operating costs
Active Publication Date: 2019-01-15
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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[0003] The purpose of the present invention is to overcome the deficiency that existing organic amine desulfurizers have poor purification effect, especially for the desulfurization of Cl in organic amine desulfurization liquid. - and SO 4 2- to provide a purification device and method with good removal effect and less desulfurization agent loss
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[0023] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0024]Panzhihua Iron and Steel's sintering flue gas has high sulfur content, complex components, strong applicability, and few desulfurization processes for recyclable sulfur resources. , and can produce more than 20,000 tons of sulfuric acid per year, which has a good application prospect and is in line with the current concept of green development. However, during the operation of this process, there is an enrichment of thermally stable salts, which leads to a decrease in desulfurization efficiency, and even blockage and corrosion cause the system to be shut down for maintenance. Currently, a resin desalination device is...
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The invention discloses a purification device and a purification method of an organic amine desulfurizing agent in an organic amine method desulfurizing process. A regenerated desulfurizing agent solution is subjected to heat exchange through a plate heat exchanger, and is then pumped into a safety filter by a pressurizing pump to be filtered; obtained filter liquid enters a nanofiltration device; filter liquid obtained after the nanofiltration is discharged into a filter liquid groove; concentrated liquid obtained through nanofiltration is discharged into a solution storage groove; the purification device also comprises a freeze crystallization system connected with the plate heat exchanger; partial solution subjected to heat exchange is subjected to freeze crystallization to remove sodium sulphate; then, the regenerated desulfurizing agent solution subjected to the sodium sulphate removal is guided into the plate heat exchanger to be subjected to heat exchange again; next, obtained liquid and the regenerated desulfurizing agent solution in a pipeline are jointly pumped into the safety filter by the pressurizing pump to be filtered; the nanofiltration device is connected with a cleaning system and a reverse flushing system. The content of Cl<-> and SO4<2-> in the regenerated desulfurizing agent solution can be continuously reduced; the cleanness of the desulfurizing agent of the desulfurizing system and the stability of the desulfurizing effect can be ensured.
Description
technical field [0001] The invention relates to the purification and desalination of the desulfurization agent of the sintering flue gas organic amine wet desulfurization system, more specifically, the invention relates to a purification device and purification method of the organic amine desulfurization agent in the organic amine desulfurization process. Background technique [0002] Panzhihua Iron and Steel No. 3 sintering flue gas desulfurization adopts organic amine technology. During the operation of the desulfurization system, due to the desulfurization agent circulation absorption and desorption, the Cl in the flue gas - and SO 2 Oxidation of the desulfurization agent leads to the accumulation of acid radical ions in the desulfurization agent, which greatly affects the S absorption effect of the desulfurization agent and reduces the desulfurization efficiency. The ion exchange resin desalination method is adopted on site. - , SO 4 2- Ions can be removed to a certai...
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IPC IPC(8): B01D53/14
CPCB01D53/1425B01D53/1481B01D53/1493B01D2252/204
Inventor 张小龙
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD