How can oxygen be removed from steam?

Heat to boiling and then condense the water vapor

Oxygen in steam can be removed by the following methods: 1. Membrane separation: Using special membrane materials to separate oxygen from other gases. This method is commonly used in industrial production to efficiently remove oxygen from steam. 2. Adsorbent: Adsorbents are used to absorb oxygen. Commonly used adsorbents include activated carbon, molecular sieves, etc. When steam is passed through the adsorbent bed, oxygen is adsorbed, thereby enabling its removal. 3. Gas purifiers: Gas purifiers can be used to react oxygen with other impurity gases to form volatile oxides, thereby removing oxygen from the vapor. 4. Precipitation method: Oxygen in the steam is removed by reacting the steam with certain chemical agents to form a precipitate, which is then filtered out. This method is suitable for small-scale vapor purification. Please note that when performing steam purification, it is necessary to select an appropriate method based on the specific application scenario and requirements, and to ensure safe operation. .

Thermal deoxygenation: Oxygen is removed from steam by heating it. This method is applicable to thermal equipment, such as boilers and steam generators. Thermal deoxidation can be achieved by increasing the steam temperature or using a dedicated deoxidizer. Chemical deoxygenation: Using a reducing agent to convert oxygen into a substance that is insoluble in water. Common reducing agents include sulfites and sulfurous acid. Chemical deoxidation is commonly used in boiler systems. Membrane deoxidation method: Oxygen is separated from steam by using special membrane materials. This method requires the use of gas permeation membranes or membrane separation technology to be implemented. Ion exchange method: Ion exchange resins are used to capture and remove oxygen from steam. The ion exchange method can achieve this by reducing the oxygen concentration in the steam

How is oxygen generated in steam? Isn’t there a deaerator?

It’s also pretty strange; I thought it was about removing oxygen from the feed water of the steam generator. Steam quality does not have a standard for oxygen content; only there is a standard for dissolved oxygen in the feed water. Once the boiler feedwater specifications are met, the oxygen content in the steam is virtually negligible (at the ppm level). If there is a problem with the feed water, the wastewater will turn red; the evaporator will suffer from oxygen corrosion and pipe penetration.

Thank you; it’s an interesting series. Feel free to participate in the discussions and exchanges. 【Ten Years of Great Development in Chemical Processing Equipment】Hydrogen-based combined heat and power demonstration projects: Prefabricated integrated systems from 2011 to 2023. https://bbs.hcbbs.com/thread-4835460-1-1.html (Source: Haichuan Chemical Industry Forum Website)

It’s a negative-pressure steam generator, with air leakage