Movable skid-mounted natural/coal bed gas adsorption and purification system with external medium heat exchange function
A technology of external medium and purification system, applied in gas fuel, petroleum industry, fuel, etc., can solve the problem of the long time required to heat the adsorbent to the required temperature, the difficulty of miniaturizing the adsorption device, and the long switching cycle of the adsorption device, etc. problems, to achieve the effect of shortening regeneration time, compact structure, and solving miniaturization
Active Publication Date: 2014-09-03
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI +1
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Problems solved by technology
figure 1 Defects of the three-tower scheme shown: Although the three-tower scheme can complete the regeneration of the adsorbent, when the purified gas is used as the regeneration gas, the gas is mainly used to heat the adsorbent and the tower body to the desorption temperature, so the regeneration gas consumption is relatively large
And under a certain pipe diameter, it takes a long time to heat the adsorbent to the required temperature, which also makes the switching cycle of the adsorption device longer, and it is difficult to miniaturize the adsorption device
Method used
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Embodiment 1
[0037] The structure diagram of this embodiment is as follows figure 2 shown;
[0038] The purification system of this embodiment is a three-tower switching process. The adsorption process, cooling process and heating and desorption process are carried out in the three towers respectively. After the adsorption of one tower is completed, the cooling of the other tower is completed, and the heating and desorption of the other tower is completed for switching use. The first adsorption tower 100 performs adsorption, the second adsorption tower 200 performs cooling, and the third adsorption tower 300 performs heating and desorption. The specific steps of the process are as follows:
[0039] Adsorption process: process gas containing impurities, the content of each component is: CO20.7%, H2S0.2%, H2O0.2%, CH495%, 0.5%N2, ethane and above hydrocarbons 3.4%, process containing impurities The gas passes through the program-controlled valve 101, the first adsorption tower 100 and the...
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The mobile skid-mounted natural / coal bed methane adsorption and purification system with external medium heat exchange related to the present invention includes an adsorption tower system and a heat transfer medium heating cycle and cooling cycle system; the adsorption tower system consists of three parallel and switchable adsorption towers Composition, one tower for adsorption, one tower for heating and desorption, and one tower for cooling: In the process of heating and desorption, the adsorbent is heated by the high-temperature heat transfer medium from the external circulation to make it desorb rapidly, and at the same time, a small amount of purified process gas is used as regeneration gas to convert The desorbed impurities are brought out; in the cooling process, the low-temperature heat transfer medium from the external circulation is used to cool the adsorbent, so that the temperature drops rapidly, and the regeneration process is completed; the regeneration time of the adsorbent can be shortened, the regeneration gas consumption can be reduced, and the adsorption cycle can be shortened at the same time. The height of the adsorption tower is reduced, and the adsorption purification system is miniaturized.
Description
technical field [0001] The invention relates to an adsorption and purification system for natural gas / coal bed methane, mainly relates to a mobile skid-mounted natural / coal bed gas adsorption and purification system with external medium heat exchange, which is applied to the deep purification of natural gas / coal bed gas before liquefaction. Background technique [0002] Natural gas / coal bed methane must be deacidified and dehydrated before liquefaction. The widely used methods in the field of natural gas / coal bed methane purification mainly include molecular sieve adsorption method, alcohol amine method, improved hot potassium method, sulfone amine method, etc. At present, large-scale coalbed methane liquefaction plants generally adopt the method of alcohol amine deacidification + molecular sieve deep dehydration, while the alcohol amine method involves towers such as absorption towers and regeneration towers. The absorption towers and regeneration towers are relatively high...
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IPC IPC(8): B01D53/02C10L3/10
Inventor 孙兆虎吴剑峰程逵炜吴建光王国强陈仕林
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI