Off H2S technology

Wet oxidation method for removing H2S technology

 

★ Overview

 

The wet oxidation gas desulfurization and de-cyanation process can be divided into two types: sodium as an alkali source and ammonia as an alkali source, and hydrogen sulfide is absorbed from the gas. During the oxidation process, the sulfur-enriched desulfurization solution is in contact with air, oxidized and regenerated in the regeneration system to form sulfur, and the alkaline aqueous solution contains a desulfurization catalyst (such as tannin extract, PDS, etc.).

 

★ Features

 

1. High desulfurization and de-cyanization efficiency, and H2S and HCN in the gas after the tower can be reduced to below 20mg/Nm3 and below 50mg/Nm3, respectively.

2. Using the patented continuous melting sulfur plant, the by-product sulfur has higher purity and low steam consumption.

3. Use a patented liquid distributor, redistributor and anti-blocking filler.

 

 

Compound amine MDEA method for removing H2S technology

 

Methyldiethanolamine (MDEA) is widely used in gas purification. It is characterized by selective removal of H2S under conditions of high CO2/H2S ratio in the feed gas, while retaining a considerable amount of CO2 in the purge gas. Therefore, not only the energy saving effect is obvious, but also the quality of the acid gas of the raw materials of the Claus plant is greatly improved. Since MDEA is a tertiary alcoholamine, there is no active H atom in the molecule, so the chemical stability is good, the solvent is not easy to degrade and deteriorate; and the foaming tendency and corrosivity of the solution are better than MEA and DEA. In view of the characteristics of MDEA, the concentration of the aqueous solution can reach 50% (M), and the acid gas load can also be 0.5 to 0.6 (acid gas) / mol of amine, or even higher. Due to the superiority of MDEA solvent, the development momentum has been rapid for many years. At present, different solution systems with MDEA as the main agent have been formed.

 

 

Sterically hindered amine de-H2S technology

 

Compared with MDEA solution, the hindered amine solution has a greater advantage, which is reflected in the high absorption and purification degree of the solution, the absorption of H2S is large, and the regeneration energy consumption is low. The higher the CO2/H2S, the larger the acid gas content. In the case, the performance is more obvious. The hindered amine solution has a higher selectivity and is more suitable for the feed gas than the MDEA solution. The desulfurization test showed that the removal rate of the hindered amine solution was significantly higher than that of the MDEA solution. Under the similar gas-liquid ratio, the C2H5SH absorption increased by about 100%.

 

 

Dry de-H2S technology

 

★ Overview

 

According to the needs of users, we provide dry desulfurization and purification technologies for various gas sources; including conventional iron oxide desulfurization, special activated carbon desulfurization, catalytic conversion desulfurization, and dry and wet methods.

 

★ Features

 

1. Simple process, easy operation and maintenance;

2. Large sulfur capacity, strong desulfurization ability and high removal accuracy

3. The investment is relatively provincial and the floor space is small;

 

 

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