Method for processing acid gas and apparatus thereof

Patent metadata

Field	Value
Publication number	US-9770689-B2
Application number	US-201414528940-A
Country	US
Kind code	B2
Filing date	Oct 30, 2014
Priority date	Feb 10, 2014
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

Abstract

The present disclosure provides a method for processing an acid gas, comprising: using a processor 1 for receiving and processing the acid gas to obtain a gas phase stream 1 and a liquid phase stream 2 , wherein the stream 2 is partially or completely recycled to the processor 1 ; using a processor 2 for processing the stream 1 from the processor 1 to obtain a gas phase stream 3 and a liquid phase stream 4 ; using a processor 3 for processing the stream 3 from the processor 2 to obtain a gas phase stream 5 and a liquid phase stream 6 ; and using a processor 4 for receiving the stream 43 from the processor 2 and using the stream 43 as a processing solution for processing the stream 5 from the processor 3 to obtain a gas phase stream 7 and a liquid phase stream 8 , which can be divided into two sub-streams including a stream 81 and a stream 82 . The present disclosure further provides an apparatus for processing an acid gas.

First claim

The invention claimed is:

1. A system for processing an acid gas, comprising:
a first processor comprising a first gas inlet and a final liquid outlet;
a second processor comprising a first liquid inlet;
a third processor comprising a second liquid inlet;
a fourth processor comprising a final gas outlet;
a gas stream that enters the system through the first gas inlet in the first processor, passing through all of the four processors, and exits the system through the final gas outlet in the fourth processor;
an alkaline solution that enters the system through the first liquid inlet in the second processor and the second liquid inlet in the third processor simultaneously, passing through all of the four processors, and exits the system through the final liquid outlet in the first processor, and
wherein the gas stream entering the system comprises H 2 S and CO 2 , and the alkaline solution exiting the system comprises Na 2 S and NaHS wherein at least one of the first processor, the second processor, the third processor, and the fourth processor is a Venturi reactor comprising:
an upper liquid storage tank that stores a first liquid, comprising a gas inlet and a liquid inlet;
a Venturi tube comprising a straight reaction tube, a throat pipe section, a discharge section, a contraction section disposed between the straight reaction tube and the throat pipe section, and an expansion section disposed between the throat pipe section and the discharge section; and
a lower gas-liquid separation tube comprising a second gas outlet and a second liquid outlet, wherein the straight reaction tube comprises a third liquid inlet upstream from the contraction section and a feed section extending into the upper liquid storage tank so that the upper liquid storage tank discharges the first liquid into the straight reaction tube by causing the aqueous solution to overflow the feed section, and
wherein the discharge section extends into the lower gas-liquid separation tube.

2. The system of claim 1 , wherein the third liquid inlet in the Venturi reactor is disposed adjacent to a location where the upper liquid storage tank and the straight reaction tube connects.

3. The system of claim 1 , wherein the feed section of the Venturi reactor has an upper edge that is sector tooth-shaped, square tooth-shaped, or triangular tooth-shaped.

4. The system of claim 1 , wherein the Venturi reactor further comprises a liquid distributor disposed in a center of the straight reaction tube and arranged to inject liquid downwardly.

5. The system of claim 1 , wherein the first processor, the second processor, the third processor, and the fourth processor are each independently selected from a group consisting of a bubble column reactor, a packed column reactor, an impinging stream reactor, a rotating bed reactor, and the Venturi reactor, with the proviso that at least one of the first processor, the second processor, the third processor, and the fourth processor is the Venturi reactor.

6. The system of claim 5 , wherein the first processor and the second processor are respectively Venturi reactors, and the third processor and the fourth processor are respectively rotating bed reactors.

Assignees

• China Petroleum & Chem Corp
• Fushun Res Inst Petroleum & Petrochemicals Sinopec Corp

Inventors

• Peng Deqiang
• Zuo Zejun
• Qi Huimin
• Wang Luyao
• Meng Fanfei
• Chen Jianbing
• Chen Xin

Classifications

• B01D53/77

  Liquid phase processes · CPC title

• B01D53/75

  Multi-step processes · CPC title

• B01D2251/304

  of sodium · CPC title

• B01D53/526 Primary

  Mixtures of hydrogen sulfide and carbon dioxide · CPC title

• B01D2251/60

  Inorganic bases or salts · CPC title