【Learn Ethylene Together】Five questions per day to easily learn about ethylene 18
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【Learn Ethylene Together】Five questions per day to easily learn about ethylene. 18 86. When the cracking furnace uses FG as fuel, what is the excess air coefficient? 87. The function of a water strainer is ( ). 88. The three ways in which toxic substances enter the human body are ( ), ( ), ( ). 89. The pH value of the process water in the quench water system should be controlled at ( ), the pH value of the quench water itself should be controlled at ( ), and the pH value of the process water waste stream is ( ). 90. The hardness of water treatment can be divided into ( ) and ( ). 86. When the cracking furnace uses FG as fuel, the excess air coefficient is ( ). 1.05～1.10 87. The function of a water strainer is ( ). Prevent steam from passing through and drain the condensate. 88. The three ways in which toxic substances can enter the human body are ( ), ( ), ( ). Respiratory tract, digestive tract, skin. 89. The pH value of the process water in the quenching system should be controlled at ( ), the pH value of the quenching water itself should be kept at ( ), and the pH value of the wastewater from the process water is ( ). 7～9.5, 7～9.5, 7～11. 90. The hardness of water can be divided into ( ) and ( ). Temporary hardness Permanent hardness
86.1.05~1.10 87. Prevent air from passing through and remove condensate 88. Respiratory tract, Digestive tract, Skin 89. 7~9.5, 7~9.5, 7~11 90. Temporary hardness, Permanent hardness
86.1.05~1.10 87. Prevent air from passing through and remove condensate 88. Respiratory tract, Digestive tract, Skin 89. 7~9.5, 7~9.5, 7~11 90. Temporary hardness, Permanent hardness
86. When the cracking furnace uses FG as fuel, the excess air coefficient is (1.05~1.10). 87. The function of a drain is (to prevent air from passing through and to discharge condensate). 88. The three ways toxic substances enter the human body are (respiratory tract), (digestive tract), and (skin). 89. The pH value of the process water in the quench water system is controlled within the range of (7~9.5), and the pH value of the quench water itself is also kept within (7~9.5); the pH value of the wastewater from the process water is within the range of (7~11). 90. The hardness of water can be divided into two types: (temporary hardness) and (permanent hardness).
86. When the cracking furnace uses FG as fuel, the excess air coefficient is (1.05–1.1). 87. The function of a drain is (to prevent air from entering the system and to separate water vapor). 88. The three ways toxic substances enter the human body are (respiratory tract), (skin), and (digestive system). 89. The pH value of the process water in the quench water system is controlled within the range of (7~9.5); the pH value of the quench water itself is also kept within (7~9.5), while the pH value of the wastewater from the process water is within (7~11). 90. The hardness of water can be divided into two types: (carbonate hardness) and (non-carbonate hardness).
86. When the cracking furnace uses FG as fuel, the excess air coefficient is (1.05~1.10). 87. The function of a drain is (to prevent air from passing through and to discharge condensate). 88. The three ways toxic substances enter the human body are (respiratory tract), (digestive tract), and (skin). 89. The pH value of the process water in the quench water system is controlled within the range of (7~9.5), and the pH value of the quench water itself is also kept within (7~9.5); the pH value of the wastewater from the process water is within the range of (7~11). 90. The hardness of water can be divided into two types: (temporary hardness) and (permanent hardness)
86. When the cracking furnace uses FG as fuel, the excess air coefficient is (1.05~1.10). 87. The function of a water strainer is (to prevent air from entering the system and to separate water vapor). 88. The three ways toxic substances enter the human body are (respiratory tract), (digestive tract), and (skin). 89. The pH value of the process water in the quench water system is controlled within the range of (7~9.5), and the pH value of the quench water itself is also kept within (7~9.5); the pH value of the wastewater from the process water is within the range of (7~11). 90. The hardness of water can be divided into two types: (temporary hardness) and (permanent hardness).
86. When the cracking furnace uses FG as fuel, the excess air coefficient is (1.05~1.10). 87. The function of a drain is (to prevent air from passing through and to discharge condensate). 88. The three ways toxic substances enter the human body are (respiratory tract), (digestive tract), and (skin). 89. The pH value of the process water in the quench water system is controlled within the range of (7~9.5), and the pH value of the quench water itself is also kept within (7~9.5); the pH value of the wastewater from the process water is within the range of (7~11). 90. The hardness of water can be divided into two types: (temporary hardness) and (permanent hardness).