【Weekly Topic】Is it necessary to install a deaerator in the water vaporization process? (There are generous rewards for voting and leaving comments! ）

Personally, I think it is very necessary to install deaerators, as in flash vapor treatment systems, the piping and equipment are generally made of carbon steel, and carbon steel is prone to oxygen corrosion. As is well known, long-cycle gasification relies on water systems, and the installation of deaerators is entirely in line with this principle.

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Vaporization occurs when a high-pressure saturated liquid enters a container at a lower pressure; the sudden drop in pressure causes this saturated liquid to turn into both saturated vapor and saturated liquid at the pressure of that container. Flash evaporation is different from distillation; no heat is added during the flash evaporation process. The principle is simple: the boiling point of a substance increases as pressure rises, and the lower the pressure, the lower the boiling point. This allows the high-pressure, high-temperature fluid to be depressurized, thereby lowering its boiling point and allowing it to enter the flash tank. At this point, the fluid temperature is higher than the boiling point at that pressure. The fluid rapidly boils and vaporizes in the flash tank, resulting in two-phase separation. The device that causes the fluid to vaporize is not a flash tank, but a pressure relief valve. The function of a flash tank is to provide a space for rapid vaporization of the fluid and vapor-liquid separation. It can be seen that flashing also has a cost, which is the sacrifice of pressure energy. In a nutshell, flashing is the process of causing a fluid to boil by reducing pressure, thereby producing a two-phase mixture of vapor and liquid. Establish the vapor-liquid equilibrium at a new pressure level. It is mostly used for pure substances. Flash evaporation is mainly used in the recovery of boiler drainage in thermal power plants and in geothermal power generation. Atmospheric pressure fixed-bed gasification technology is a process in which solid fuel is converted into gas using air, steam, and oxygen as gasifying agents. Since the first atmospheric-pressure fixed-bed gas generator was put into operation in Germany in 1882, this technology has continued to be improved. Due to its mature and reliable technology, low investment requirements, and short construction period, it is still widely used both domestically and internationally. It is used to produce gas in industries such as metallurgy, building materials, and machinery. It is used to produce syngas in small and medium-sized ammonia synthesis plants. However, it can be expected that, as production technologies continue to evolve and corporate production scales expand along with the growth in plant size, this gasification technology, due to its strict requirements for raw materials, low production capacity, and high energy consumption, will eventually be phased out over time. The main components of gas produced by atmospheric-pressure fixed-bed gasification are H2, CO, and a small amount of CH4; nitrogen in semi-water gas used in ammonia synthesis is also a component. Gas used as fuel is measured in terms of its calorific value, whereas gas used as syngas is expressed by the volume percentage of CO and H2. Industrial gas is generally classified into air gas, mixed gas (producer gas), water gas, semi-water gas, and medium calorific value gas.

Aren’t all current projects starting to use hot water towers for the thermal deoxidation of the system water?

To prevent corrosion of equipment and pipelines, deaerators are essential; after all, low-pressure graywater comes into close contact with air

It’s necessary, because I work on deaerators, and deaerators used in coal chemical industries are particularly prone to clogging