Excessive hydrogen sulfide levels after the desulfurization tower
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The hydrogen sulfide level after the desulfurization tower is always above the specified limit (our plant’s standard is 0.22 g/m3). Do anyone have any good solutions?
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Does your factory use a wet flue gas desulfurization process? Or other processes?
What desulfurization process do you use? How is sulfur ointment produced, using a filter press? Consider whether the regeneration is not working properly, or if there is an excessive amount of suspended sulfur in the desulfurization circulation fluid; if a filter press is used, it might be possible to direct part of the circulation fluid to the filter press so that the larger amount of suspended sulfur can be filtered out through it
Control the flow rate of compressed air to ensure regular and frequent discharging from the top of the tower; use sufficient amounts of chemicals, and have an adequate supply of alkaline sources such as NH3.H2O. Keep the temperature of the desulfurization liquid at around 35 degrees
Let’s take a look at the desulfurization temperature and quality control issues of the desulfurization solution
There are many reasons for exceeding the specifications: issues with the internal components and packing in the desulfurization tower, problems with the quality of the desulfurization liquid, unreasonable process design, and operational errors. The cause must be determined based on the actual situation
First, it is necessary to check whether the process design is reasonable; here we use one tower for pre-cooling, one tower for desulfurization, and one tower for regeneration. Regeneration is achieved not by floating injection but by air injection from the bottom, with very good results. Secondly, the pressure of the regenerative tower compressor should be kept above 0.5 MPa. Third, the desulfurization by-products must be properly controlled and removed promptly. Fourth, the catalyst should be added evenly.
The most effective method. Switch to methanol – does methanol last a long time?