Efficient low-loss solvent and process used for absorbing toluene
An absorbent, toluene technology, applied in the field of high-efficiency and low-loss solvents and processes, can solve the problems of high requirements for microbial strains, secondary pollution of activated carbon, and high catalyst costs, and solve the problem of substandard discharge concentration, low solvent loss, and absorption efficiency. high effect
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Embodiment 1
[0027] A high-efficiency and low-loss flow process for absorbing toluene in this embodiment, the schematic flow chart of which is shown in figure 1 shown. The specific processing steps are as follows:
[0028] Waste gas containing toluene (the flow rate of waste gas containing toluene from the coating process is 4000m 3 / h, operating temperature is 35°C, toluene concentration is 400g / m 3 ) first from the absorption tower (the height of the absorption tower is 12m, the height of the lower packing layer is 5m, the height of the upper packing layer is 3m, and the tower diameter is 0.8m; The gas feed inlet of the lower section, which is arranged with liquid level gauge, temperature sensor and pressure sensor) enters the absorption tower, and flows from bottom to top in the absorption tower; at the same time, the absorbent NMP enters from the middle feed inlet of the absorption tower (flow rate 200kg / h), and absorb from top to bottom in countercurrent contact with exhaust gas in...
Embodiment 2
[0031] A high-efficiency and low-loss flow process for absorbing toluene in this embodiment, the schematic flow chart of which is shown in figure 1 shown. The specific processing steps are as follows:
[0032] Waste gas containing toluene (the flow rate of waste gas containing toluene from the coating process is 6000m 3 / h, operating temperature is 35°C, toluene concentration is 500g / m 3) first from the absorption tower (the height of the absorption tower is 12m, the height of the lower packing layer is 5m, the height of the upper packing layer is 3m, and the tower diameter is 0.8m; The gas feed inlet of the lower section, which is arranged with liquid level gauge, temperature sensor and pressure sensor) enters the absorption tower, and flows from bottom to top in the absorption tower; at the same time, the absorbent NMP enters from the middle feed inlet of the absorption tower (flow rate 300kg / h), and absorb from top to bottom in countercurrent contact with the exhaust gas...
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