Control method and device for purification of amine liquid
A control device and amine liquid technology, which is applied in the field of liquid purification, can solve the problems of large impact on sewage treatment systems, environmental and human hazards, etc., and achieve the effects of reducing device corrosion, reducing amine liquid consumption, and reducing impact
Active Publication Date: 2017-01-25
JIANGXI NERIN ELECTRIC AUTOMATION
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Problems solved by technology
However, due to the high COD (Chemical Oxygen Demand, chemical oxygen demand) content of amine liquid (6% amine liquid COD mass concentration is above 30000 mg / L), once it is discharged into the sewage, it will not only have a great impact on the sewage treatment system, but also And it is harmful to the environment and human body
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[0032] The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but not to be construed as a limitation of the present invention.
[0033] The following disclosure provides many different embodiments or examples for implementing different structures of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purp...
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The invention discloses a control method and device for purifying amine liquid. The control method includes the following steps: purifying the amine liquid through an ion exchange column to reduce the content of heat-stable salt HSS in the amine liquid; judging the effect of the ion exchange column on the HSS Whether the absorption reaches saturation; if so, recover the amine liquid in the ion exchange column through deionized water; use lye to pass through the ion exchange column to clean the HSS in the ion exchange column. This control method not only saves energy, reduces the consumption of amine liquid, and reduces costs, but also greatly reduces the corrosion of the device while improving the desulfurization efficiency of the device, prolongs the service life of the device, and reduces the impact on the sewage treatment system, avoiding Harmful to the environment and human body.
Description
technical field [0001] The invention relates to the technical field of liquid purification, in particular to a control method and device for purification of amine liquid. Background technique [0002] Alcohol amine absorbers are commonly used in smelters to remove SO in tail gas 2 Acid gas, SO in alcohol amine absorbers 2 The absorbent is mainly a 20% to 50% aqueous alcohol amine solution. Among them, SO 2 The absorbent is a thermally regenerable amine solution that reversibly absorbs SO from flue gas 2 . [0003] However, the alkanolamine absorber can pretreat the flue gas, but impurity components such as dust, acid mist and sodium salts can still contaminate the solution in the device. Among them, in addition to the main reaction of absorption / desorption, various side reactions (such as sulfite oxidation, disproportionation reaction) will occur correspondingly in the solution, resulting in the formation of thermally stable salts (HSS). Specifically, thermally stable ...
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IPC IPC(8): C02F1/42
Inventor 白天严明章明智胡国军薛惠李俊王召启陈敬军
Owner JIANGXI NERIN ELECTRIC AUTOMATION