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Process for removing sulfate ions and chloride ions in organic amine desulfurization solution and reducing the loss of organic amine solution
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A technology of sulfate ion and desulfurization solution, applied in the field of organic amine solution, can solve the problems of difficult discharge of waste water, large loss of desulfurization solution, insufficient removal rate, etc. effect of loss
Active Publication Date: 2021-12-21
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +1
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Problems solved by technology
[0006] The purpose of the present invention is to overcome the problems of insufficient removal rate of impurity ions in desulfurization solution, large loss of desulfurization solution, high cost of impurity removal, and difficult disposal of waste water in the existing sintering flue gas organic amine desulfurization process.
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Embodiment 1
[0059] A. During the initial operation of the process, the desulfurization solution absorbs SO 2 Enter the heat exchanger, and regenerate SO at 102 ° C ~ 110 ° C 2 After heat exchange, the organic amine solution containing sulfate ions and chloride ions is obtained, which flows into the activated carbon adsorption tank. At this time, the sulfate radical in the solution is 37g / L, the chloride ion is 0.7g / L, the content of desulfurization agent is 32g / L, and the temperature is 55°C ~60℃, pH 4.8~5.2;
[0060] B. Take about 12.5m 3 The solution is injected into the amphoteric resin exchange column through the pump, and the up-in and down-out method is adopted to adsorb organic amine cations (desulfurizer components) and SO 4 2- , after running for 5 to 10 minutes, open the discharge valve to make the organic amine cations, SO 4 2- with Cl - Separation, i.e. high concentration of Cl - The solution is discharged, and the valve is closed after running for 40 minutes, and the a...
Embodiment 2
[0065] A. When the process is running normally, the desulfurization solution absorbs SO 2 Enter the heat exchanger and regenerate SO at 110°C 2 After heat exchange, it flows into the activated carbon adsorption tank to obtain an organic amine solution containing sulfate ions and chloride ions, which flows into the activated carbon adsorption tank. At this time, the sulfate radical in the solution is 84g / L, the chloride ion is 2.4g / L, and the content of desulfurization agent is 61g / L. , temperature 55°C, pH 5.2;
[0066] B. Take about 20m 3 The solution is injected into the amphoteric resin exchange column through the pump, and the up-in and down-out method is adopted to adsorb organic amine cations (desulfurizer components) and SO 4 2- , after running for 5 to 10 minutes, open the discharge valve to make the organic amine cations, SO 42- with Cl - Separation, i.e. high concentration of Cl - The solution is discharged, and after running for 40 minutes, close the valve for...
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Abstract
The invention discloses a process for removing sulfate ions and chloride ions in an organic amine desulfurization solution and reducing the loss of the organic amine solution, belonging to the technical field of organic amine liquid purification. The invention provides a method for removing impurity ions in organic amine desulfurization solution and reducing solution loss in order to overcome the problems of insufficient removal rate of impurity ions in the prior art, large loss of desulfurization solution, high cost of impurity removal, and difficult treatment of waste water discharge. The process includes: organic amine desulfurization solution is adsorbed and separated from SO by amphoteric resin exchange column 4 2‑ , organic amine cations and separation of Cl ‑ ions, followed by Cl ‑ ions and a small amount of organic amine cation solution are adsorbed by anion resin exchange column to remove Cl ‑ , the purified liquid is mixed and returned to the desulfurization tower. The invention can be used to solve the problems of desulfurization agent poisoning, desulfurization agent loss and poor desulfurization effect in the organic amine process, so as to ensure the stable and efficient operation of the desulfurization system and greatly reduce the operating cost of the process.
Description
technical field [0001] The invention belongs to the technical field of organic amine liquid, and in particular relates to a process for removing sulfate ions and chloride ions in an organic amine desulfurization solution and reducing the loss of the organic amine solution. Background technique [0002] Panzhihua Iron and Steel No. 3 sintering flue gas desulfurization adopts organic amine technology. During the operation of the desulfurization system, the pH value of the desulfurization lean liquid is controlled at 5.0-6.0 to absorb SO 2 The pH of the post-rich solution is controlled at 4.0-5.0. Due to the cyclic absorption-desorption of the desulfurizer, the Cl in the solution - and SO 4 2- There is severe enrichment, when Cl - When the concentration reaches a certain level, the internal components of the system will be severely corroded, and the outer wall of the desulfurization tower will be corroded and leaked, seriously affecting the operation of the desulfurization s...
Claims
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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14
CPCB01D53/1425B01D2258/0283B01D2257/302
Inventor 张小龙邱正秋王建山刘鹏举
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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