I would appreciate your guidance on the problems arising from inadequate filtering in the synthesized ammonia production process

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Desulfurization process stage: Issue: Abnormal conditions of \"three highs, one low, and two severe issues\" occurred during production, namely a high rate of process non-compliance, a high rate of by-product salt formation, and high material consumption； Low sulfur recovery rate ； The tower suffers from severe liquid entrainment, and the process gas exiting the tower carries a significant amount of liquid. Reason: 1. The composition of the gas entering the desulfurization tower is poor, with a high content of impurities (such as fly ash, coal tar, and other solid particles) that clog the packing layer; most cases of tower blockage by manufacturers are related to this reason. 2. The quality assurance of the desulfurization solution, with the content of by-products and suspended solids being the key indicators; 3. The rationality of the process design. 4. Side effects of the catalyst. Solution: 1. Pre-filter the gas entering the tower to remove impurities present in it. 2. A parallel filter is installed at the outlet of the lean liquid tank (to facilitate cleaning) to prevent various physical impurities from entering the desulfurization tower. Decarburization process issues: The decarburization solution often forms foam, and there is severe liquid accumulation in the absorption tower; a large amount of defoamer is required to control this situation. Upon inspection of the tower, its walls were found to be blackened. Reason: 1. The presence of certain organic impurities in the solution reduces its surface tension, allowing gas to easily reach the liquid surface and form bubbles ； 2. Certain substances in the solution increase the stability of the bubbles. Ways impurities enter: 1. Hydrocarbons, oils, and rust that come in with the raw materials, as well as those brought in along with chemicals and water ； 2. Corrosion products of the equipment ； 3. Degradation products of certain components in the solution, as well as products of certain impurities in the solution and gas ； 4. Debris introduced by pumps, solution tanks, etc. Solution: 1. Use a fine mechanical filter for filtration; PP, PE filter elements or metal filter elements can be chosen. Among them, PP and PE filter elements have low heat resistance and are suitable for low-temperature solutions, while metal filter elements have high heat resistance and are suitable for high-temperature solutions. 2. Maintain the cleanliness of the system solution, prevent impurities from entering with the water added, and stop mechanical oil and similar substances from getting into the system. Liquid ammonia cooling stage: Problem: Impurities tend to stick to the walls of the coiled tubes, affecting heat exchange efficiency; during ammonia cooling in the circulation pump, pipe blockages can occur and the packing can be severely damaged. Reason: Impurities such as oil, moisture, and catalyst powder are suspended in liquid ammonia; these impurities in the ammonia storage tank cannot be purified through natural sedimentation. They are added to the ammonia cooler along with liquid ammonia. Solution: Use an automatic filter to prevent impurities in liquid ammonia from entering the ammonia-cooled gas.