Natural gas desulfurization technology is divided into physical absorption method, chemical absorption method and oxidation method. This method is represented by the pressure reduction method, in which butyl alum is used as the absorption agent, and then H2S is absorbed by the pressure reduction method, represented by the physical absorption method.
Chemical absorption method uses weak alkaline solvent as absorbent, and the absorption process is accompanied by chemical reaction process. The absorbent after absorbing H2S can be regenerated after increasing temperature and reducing pressure. Hot arsenic alkali method belongs to chemical adsorption method; The oxidation method uses alkaline solution as absorbent and oxygen carrier as catalyst to absorb H2S and oxidize it into elemental sulfur. The oxidation method is represented by improved ADA method and tannin extract method.
The gas containing H2S enters from the lower part of the desulfurization tower and reacts with the desulfurization lean liquid sprayed on the top of the tower in the packing layer to absorb and remove H2S. The purified gas is discharged from the top of the desulfurization tower, and then the excess water is removed in the drip catcher and sent to the workshop for use.
After absorbing H2S from the top of the tower, the solution flows into the rich liquid tank for sulfur separation, and then is sent to the jet regeneration tank through the regeneration pump for reaction with air. After being oxidized and regenerated, the solution flows into the lean liquid tank through the liquid level regulator, and then is pumped into the desulfurization tower through the desulfurization pump for continuous desulfurization. At the same time, the sulfur foam generated in the spray regeneration tank is spilt to the foam pool for filtration, and the sulfur paste is filtered out.
2. Compared with dry desulfurization, although the investment is 2-3 times that of dry desulfurization, the operation cost is low, 1000nm ? The actual desulfurization cost is about 4 yuan, which avoids the increase of production cost of dry desulfurization system due to poor desulfurization effect after desulfurization agent regeneration and sulfur adsorption.
3. It has the characteristics of stable operation, safe operation and high desulfurization efficiency. The desulfurization efficiency can reach more than 97%, and the H2S content in the gas after desulfurization is less than 50mg / Nm3.
4. If the desulfurization catalyst is PDS or '888', it can not only remove H2S, but also remove some organic sulfur accounting for about 10% of the total sulfur in the gas.
適用范圍編輯 播報
Scope of application: editing and broadcasting
適用于各種煤氣、沼氣和天然氣的脫硫(H2S)。
It is suitable for desulfurization (H2S) of various gas, biogas and natural gas.
企業(yè)二維碼
2022-03-10
魯公網(wǎng)安備37011202000764號號