Quick treatment method for clogged desulfurization regeneration injectors

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Wet desulfurization processes are typically used for desulfuring coke oven gas in coking plants. As for the regeneration phase, spray regeneration or high-tower regeneration methods are mainly employed. In spray regeneration, blockages can occur in the injectors – how should such issues be addressed? As the operating cycle prolongs, blockages occur inside the ejector, preventing it from drawing in air; meanwhile, some salt crystals and sulfur impurities gradually accumulate at the air intake and within the chamber. When impurities accumulate to a certain level, the air intake passage of the ejector becomes narrower, resulting in a decrease in the amount of air drawn in by the ejector. In severe cases, this can lead to backflow of liquid and foam within the ejector. Observations of the operation of certain devices have shown that, especially when the specific gravity of the desulfurization solution is high and its salt content is high, the frequency of blockages in the regeneration injectors increases; cleaning them requires a lot of effort, and failing to clean them leads to an accelerated deterioration in performance. To clean the injector, the most common method is to remove it in order to clean it. Disassemble the nozzle and chamber, then clean the interior to restore the suction performance of the regenerative ejector. Generally, in winter when the ambient temperature is low, the temperature of the air drawn in by the ejector is also low, which increases the frequency of crystallization blockages at the suction inlet of the ejector. This is a very troublesome issue in the ejector regeneration process. https://p3-sign.toutiaoimg.com/tos-cn-i-qvj2lq49k0/49c6a156ba4144e0962ebcb7a3c1a9b6~noop.image?_iz=58558&from=article.pc_detail&x-expires=1684371844&x-signature=zKN9iuBmc5CznAjnpRXdvP2G3Sk%3D Blockages within the ejector chamber: To promptly address issues related to crystal blockages in ejectors, there are two effective methods. Method 1: Install a clean water pipe on the surface of the regeneration tank, directing the water to the top portion of the tank. Attach a branch pipe to this main pipe along with a valve; connect a DN15 rubber hose to the valve. By opening the valve periodically, clean water can be directed through the hose to flush out any blockages at the intake ports of ejectors experiencing reduced suction capacity. This process also helps replenish the water loss. Method 2: Introduce a low-pressure steam pipe into the top of the regeneration tank, and use the temperature of around 150 degrees from the low-pressure steam to rapidly dissolve the crystalline deposits in the inlet of the injector and within its chamber. When using steam, it is important to be careful not to apply it for too long; it is sufficient to stop once the passages are cleared. Steam treatment is used for cases with severe crystalline blockage. Finally, during the spray regeneration process, the issue of crystallization blockage in the sprayer is directly related to the amount of air drawn in for regeneration, the volume of the circulating liquid, and the performance of the sprayer. Therefore, by reasonably controlling the inhalation volume and the balance of the circulating fluid over the long term, and by selecting injectors with superior performance, blockage problems can be effectively avoided.