Terminology in chemical production

Explosive limits Spontaneous ignition point Ignition point Flashing point Azeotrope Vapor pressure Vaporizing velocity Boiling range

The absorbent liquid after the natural gas purification lean liquid has been regenerated and the rich liquid has no absorption capacity. The relevant explanations should also be written.

Start-up, stop, purge, cleaning, residence time, batch production, continuous production, pressure-maintaining catalyst__ _ _ _ _ _ _ _ _

There are management: Implement discipline in conjunction with discussions and orders ==

1. Density of matter: The mass of material contained in unit volume. 2. Temperature: A physical quantity that expresses the degree of hotness or coldness of an object. It is a symbol of the average kinetic energy of molecules. 3. Material balance: The mass of materials input into the equipment per unit time must be equal to the sum of the masses of the output materials, or the mass of materials input to the process must be equal to the sum of the mass of materials output from the process and the mass of materials accumulated in the process. 4. Pump flow rate: The amount of liquid that the pump can discharge into the system pipeline per unit time, that is, the pump outlet flow rate per unit time, can be expressed in mass or volume units, kg/h, m3/h (min). 5. Vaporization rate: The ratio of the amount of vaporization after heating to the total amount of feed (percentage). 6. Volatility: Is a measure of how easily a liquid vaporizes. Indicates the ability of a substance to vaporize and evaporate. It is related to the vapor pressure of the substance at a certain temperature. Substances with higher vapor pressure are called volatile substances, and substances with lower vapor pressure are called refractory substances. 7. Specific heat: Under the condition of no phase change or chemical change, the heat absorbed and released by a unit weight of a substance when the temperature increases or decreases by 1°C or 1K. 8. Dew point corrosion: Corrosion caused by condensation of acid when the gas temperature drops below the dew point. 9. Product distribution: The yield distribution relationship between products. 10. Mole fraction: The ratio of the number of moles of a certain component in a mixture to the total number of moles of the mixture is called the mole fraction of the component. 11. Mass fraction: The ratio of the mass of a component in a mixture to the total mass of the mixture is called the mass fraction of the component. 12. Viscosity-temperature characteristics: The property of oil viscosity changing with temperature. 13. Pressure: The pressure exerted vertically by a fluid on a unit area is called the pressure of the fluid. 14. Vacuum degree: The pressure inside the equipment is less than the atmospheric pressure. 15. Saturated vapor pressure: At a certain temperature, when the liquid and the steam above the liquid surface are in equilibrium, the pressure generated by the steam is the saturated vapor pressure. Vapor pressure indicates the ability of the separated liquid to vaporize or evaporate. The higher the vapor pressure, the easier it is for the liquid to vaporize. 16. Gauge pressure: It is equal to the difference between absolute pressure and atmospheric pressure. 17. Catalyst: A substance that can change the speed of a chemical reaction while keeping its composition, quality, and properties unchanged before and after the reaction is called a catalyst. The two major characteristics of catalysts are that they can change the speed of chemical reactions and are selective. 18. Mass transfer process: The process of transferring a substance from one phase to another. 19. Phase equilibrium state: When a system that only involves phase changes reaches such a state, no macroscopic changes can be observed as it migrates over time, that is, the properties of the system do not change with time, this state is a phase equilibrium state. (The number of molecules of liquid evaporating into space per unit time is the same as the number of molecules of liquid returning to space). 20. Internal energy: It is the energy stored inside matter, which refers to the total energy contained in objects such as molecules, atoms, electrons, etc.

21. Local resistance: The resistance when the fluid flows through local locations such as the inlet, outlet, elbow, valve, expansion, contraction or flow meter of the pipeline is called local resistance. 22. Carbon residue: The oil is decomposed by heat, and the coke formed by condensation accounts for the weight percentage of the oil. 23. Airspeed: Refers to the amount of raw material processed by a unit catalyst in a unit time (volume space velocity, mass space velocity). 24. Heat transfer coefficient: When the temperature difference between hot and cold fluids is 1°C, the heat transferred through unit heat transfer area in unit time. 25. Latent heat: The heat absorbed or released when the oil vaporizes or condenses, while the temperature remains unchanged. 26. Sensible heat: The heat absorbed by oil before phase change during heating is called sensible heat. 27. Latent heat of evaporation: The amount of heat required to turn 1 kilogram of liquid oil into gaseous oil at the same temperature under normal pressure and boiling point. 28. Stability of oil products: Refers to the chemical stability of the oil, that is, its ability to resist oxidation during storage. 29. Cooling: The process by which a substance moves from a higher temperature to a lower temperature. 30. Condensation: The exothermic process of a substance converting from gaseous to liquid state, during which the temperature does not change.

31. Hydrocarbon: Compounds composed of carbon and hydrogen are called hydrocarbons, or hydrocarbons for short. 32. Evaporation: The phenomenon of vaporization on the surface of a liquid is called evaporation. 33. Heat conduction: Heat is transferred from a higher-temperature part of an object to a lower-temperature part, or from a higher-temperature object to a lower-temperature object in direct contact. 34. Stay time: The time required for the reaction mass to pass through the static catalyst. 35. Atmospheric pressure: Air pressure at the Earth's surface. 36. Boiling point: When a substance vaporizes simultaneously inside and on the surface of the liquid under atmospheric pressure, the temperature at this time is called the boiling point of the substance. 37. Traffic: The total amount of fluid (volume, mass) flowing through any section of the pipeline per unit time. 38. Flow rate: How fast the fluid flows in the pipeline, and the distance the fluid flows along the flow direction per unit time. 39. Vaporization: The process of converting matter from liquid to gaseous state. 40. Energy accounting: According to the law of conservation of energy, in any chemical production process, the energy input to the process must be equal to the energy output from the process. 41. Physical explosion: An explosion caused by the sudden change of state and pressure of matter. 42. Chemical explosion: Explosions caused by extremely rapid chemical reactions of substances to produce high-temperature, high-pressure reaction products are called chemical explosions. 43. Specific volume: The reciprocal of density is called specific volume. 44. Kinetic energy: The energy possessed by a fluid moving at a certain speed. 45. Thermal convection: The process of transferring thermal energy from one place to another due to the relative displacement and mixing of particles in a fluid. 46. ​​Thermal radiation: The transmission of electromagnetic waves in space due to heat is called thermal radiation. 47. Kinematic viscosity: It is the ratio of the dynamic viscosity of a liquid to its density. 48. Flash point: Under specified conditions, the oil is heated. As the oil temperature increases, the concentration of oil and gas in the air above the oil gradually increases. Within a certain concentration range, when an open flame is used to ignite the oil and gas mixture, an instantaneous flash fire will occur above the oil. The lowest temperature at which this phenomenon occurs is called the flash point. 49. Relative density: The ratio of the density of a substance at a certain temperature to the density of water at 4°C. 50. Absorption: The process of achieving separation based on the different solubilities of each component in a gas mixture in a certain solvent.

Co-dissolving point, co-condensation point, flash evaporation, flash combustion, dehydration value, reaction rate

Air velocity Hydrogen oil ratio Compression ratio Hydrogen partial pressure Tempering oven Lift shaft power

Flooding, evaporation, differential pressure transmitter, safety valve, flow meter, regulating valve, pneumatic diaphragm pump