FAQs on Atmospheric and Vacuum Distillation Units, November 20171

Answer: 1. Wastewater: oily wastewater, as well as wastewater from production and domestic activities. It mainly comes from the dehydration of various containers in the process, as well as water used for production and daily purposes. 2. Exhaust gases: Gas emitted after the combustion of initial gas, normal gas, reduced-pressure gas, and heating furnace fuel. During normal production, the initial roof gas, regular roof gas, and reduced roof gas are each directed to a heater for combustion; therefore, under normal operating conditions, this facility does not emit any polluting waste gases into the atmosphere. The safety valves for oil and gas at the tops of the towers and vessels are equipped with a vent manifold that leads the gases outside the facility to be burned in a flare. Therefore, the main source of air pollution is the flue gas emitted after fuel is burned in heating furnaces. According to flue gas monitoring data, it contains SO2 and NOX; the emissions of these substances are below the **emission standards, so they have little impact on environmental quality. 3. The atmospheric and vacuum distillation unit does not generate waste residues. 4. Noise: Noise pollution mainly comes from the burners of the heating furnaces, the motors of pumps and fans, as well as the fans of air coolers.

① Wastewater: oily wastewater and wastewater from production and domestic activities. It mainly comes from the dehydration of various containers in the process, as well as water used for production and daily purposes. ② Waste gas: Flue gases emitted after the combustion of initial gas, normal gas, reduced-pressure gas, and heating furnace fuel. During normal production, the initial roof gas, regular roof gas, and reduced roof gas are each directed to a heating furnace for combustion; therefore, under normal operation of this facility, no polluting exhaust gases are released into the atmosphere. The safety valves for oil and gas at the tops of the towers and vessels are equipped with a vent manifold that leads the gases outside the facility to be burned in a flare. Therefore, the main source of air pollution is the flue gas emitted after fuel is burned in heating furnaces. According to flue gas monitoring data, it contains SO2 and NOX; the emissions of these substances are below the **emission standards, so they have little impact on environmental quality. ③The atmospheric and vacuum distillation unit does not generate any waste residue. ④ Noise: Noise pollution mainly comes from the heating furnace nozzles, the motors of pumps and fans, and the air coolers’ fans.

① Wastewater: oily wastewater and wastewater from production and domestic activities. It mainly comes from the dehydration of various containers in the process, as well as water used for production and daily purposes.   ② Waste gas: Flue gases emitted after the combustion of initial gas, normal gas, reduced-pressure gas, and heating furnace fuel. During normal production, the initial roof gas, regular roof gas, and reduced roof gas are each directed to a heater for combustion; therefore, under normal operating conditions, this facility does not emit any polluting waste gases into the atmosphere. The safety valves for oil and gas at the tops of the towers and vessels are equipped with a vent manifold that leads the gases outside the facility to be burned in a flare. Therefore, the main source of air pollution is the flue gas emitted after fuel is burned in heating furnaces. According to flue gas monitoring data, it contains SO2 and NOX; the emissions of these substances are below the **emission standards, so they have little impact on environmental quality.   ③The atmospheric and vacuum distillation unit does not generate any waste residue.   ④ Noise: Noise pollution mainly comes from the heating furnace nozzles, the motors of pumps and fans, and the air coolers’ fans.  

1. Wastewater, including electrodialysis dehydration and dehydration in the tower top reflux tank, etc； 2. Exhaust gases, including flue gas emitted from heating furnaces and leaks in the equipment. 3. Hazardous waste, such as used lubricants, etc

① Wastewater: oily wastewater and wastewater from production and domestic activities. It mainly comes from the dehydration of various containers in the process, as well as water used for production and daily purposes. ② Waste gas: Flue gases emitted after the combustion of raw gas, normal gas, reduced-pressure gas, and heating furnace fuel. During normal production, the initial roof gas, regular roof gas, and reduced roof gas are each directed to a heater for combustion; therefore, under normal operating conditions, this facility does not emit any polluting waste gases into the atmosphere. A vent main is provided for the safety valves of the oil and gas at the top of the tower and vessels, leading to an external flare to burn them off. Therefore, the main source of air pollution is the flue gas emitted after fuels are burned in heating furnaces. According to flue gas monitoring data, the emissions of SO2 and NOX in this gas are below the **emission standards, so it has little impact on environmental quality. ③The atmospheric and vacuum distillation unit does not generate any waste residue. ④ Noise: Noise pollution mainly comes from the heating furnace nozzles, the motors of pumps and fans, and the air coolers’ fans.

Wastewater: oily wastewater and wastewater from production and domestic activities. It mainly comes from the dehydration of various containers in the manufacturing process, as well as from production activities

① Wastewater: oily wastewater and wastewater from production and domestic activities. It mainly comes from the dehydration of various containers in the process, as well as water used for production and daily purposes. ② Waste gas: Flue gases emitted after the combustion of initial gas, normal gas, reduced-pressure gas, and heating furnace fuel. During normal production, the initial roof gas, regular roof gas, and reduced roof gas are each directed to a heater for combustion; therefore, under normal operating conditions, this facility does not emit any polluting waste gases into the atmosphere. The safety valves for oil and gas at the tops of the towers and vessels are equipped with a vent manifold that leads the gases outside the facility to be burned in a flare. Therefore, the main source of air pollution is the flue gas emitted after fuel is burned in heating furnaces. According to flue gas monitoring data, it contains SO2 and NOX; the emissions of these substances are below the **emission standards, so they have little impact on environmental quality. ③The atmospheric and vacuum distillation unit does not generate any waste residue. ④ Noise: Noise pollution mainly comes from the heating furnace nozzles, the motors of pumps and fans, and the air coolers’ fans.

① Wastewater: oily wastewater and wastewater from production and domestic activities. It mainly comes from the dehydration of various containers in the process, as well as water used for production and daily purposes. ② Waste gas: Flue gases emitted after the combustion of raw gas, normal gas, reduced-pressure gas, and heating furnace fuel. During normal production, the initial roof gas, regular roof gas, and reduced roof gas are each directed to a heater for combustion; therefore, under normal operating conditions, this facility does not emit any polluting waste gases into the atmosphere. A vent main is provided for the safety valves of the oil and gas at the top of the tower and vessels, leading to an external flare to burn them off. Therefore, the main source of air pollution is the flue gas emitted after fuels are burned in heating furnaces. According to flue gas monitoring data, the emissions of SO2 and NOX in this gas are below the **emission standards, so it has little impact on environmental quality. ③The atmospheric and vacuum distillation unit does not generate any waste residue. ④ Noise: Noise pollution mainly comes from the heating furnace nozzles, the motors of pumps and fans, and the air coolers’ fans.

Answer: ① Wastewater: oily wastewater and wastewater from production and daily life. It mainly comes from the dehydration of various containers in the process, as well as water used for production and daily purposes.   ② Waste gas: Flue gases emitted after the combustion of initial gas, normal gas, reduced-pressure gas, and heating furnace fuel. During normal production, the initial roof gas, regular roof gas, and reduced roof gas are each directed to a heater for combustion; therefore, under normal operating conditions, this facility does not emit any polluting waste gases into the atmosphere. The safety valves for oil and gas at the tops of the towers and vessels are equipped with a vent manifold that leads the gases outside the facility to be burned in a flare. Therefore, the main source of air pollution is the flue gas emitted after fuel is burned in heating furnaces. According to flue gas monitoring data, it contains SO2 and NOX; the emissions of these substances are below the **emission standards, so they have little impact on environmental quality.   ③The atmospheric and vacuum distillation unit does not generate any waste residue.   ④ Noise: Noise pollution mainly comes from the heating furnace nozzles, the motors of pumps and fans, and the air coolers’ fans.