Desulphurization
There are two main methods of natural gas desulfurization: dry desulfurization and wet desulfurization.
The amine process is applicable when natural gas contains a small amount of H2S and a high CO2/H2S ratio, but the CO2 content is not very high and does not require deep CO2 removal. This approach can effectively remove both H2S and CO2 simultaneously.
Molecular sieve method is commonly used for applications that require high desulfurization accuracy or low flow rates.
Here we introduce a new Iron Oxide Process
Iron Oxide Process Description
This proposal adopts dual towers running in parallel, serving as backup for each other .
First, use desulfurization tower A. After running for a period of time, if the test results of sample 2 are close to the design value, it means that the tower packing is saturated and has lost its desulfurization capacity, and needs to be replaced. When replacing, first open valve 3 and valve 4, then close valve 2 and valve 1, and purge desulfurization tower A with nitrogen until the gas test is qualified, then open the cleaning port and the venting port to regenerate the packing. After the regeneration is completed, open the manhole and the discharge hole to replace the packing. At this time, the gas passes through desulfurization tower B and has achieved the purpose of desulfurization.
When desulfurization tower B is saturated, open valve 1 and valve 2, then close valve 3 and valve 4, and purge desulfurization tower B with nitrogen until the gas is tested to be qualified, then open the cleaning port and the venting port to regenerate the packing, and after the regeneration is completed, open the manhole and the discharge port to replace the packing. At this time, the gas passes through desulfurization tower A to achieve the purpose of desulfurization.
A feed gas sampling nozzle is provided at the inlet and outlet of each tower for sampling and testing.
The desulfurizer regeneration operation first uses inert gas to replace the flammable gas components to below the explosion limit. During regeneration, air is introduced from the bottom of the tower . The air velocity should be low at the beginning of regeneration. The temperature in the tower should be strictly controlled below 90 ℃. If it exceeds 90 ℃, the air introduction can be suspended. When the temperature drops below 90 ℃, the air introduction can continue to be introduced for regeneration. When the bed temperature no longer rises and the oxygen content at the inlet and outlet is basically equal, the regeneration can be terminated. When replacing the desulfurizer, the discharge port at the bottom of the tower can be opened to release the desulfurizer. For safety reasons, water spraying should be appropriately used for cooling.
Material requirements: The main body of the desulfurization tower is made of Q345R anti-corrosion material.
Contact:
Sichuan Rongteng Automation Equipment Co., Ltd.
Phone/WhatsApp/Wechat : +86 177 8117 4421
Website: www.rtgastreat.com Email: info@rtgastreat.com
Address:No. 8, Section 2 of Tengfei Road, Shigao Subdistrict,Tianfu New Area, Meishan city, Sichuan China 620564