Multiple placing in turn interleaving flushing pressure variable adsorption technique

A pressure swing adsorption and smooth discharge technology, applied in the field of pressure swing adsorption, can solve the problems of increasing the investment area of ​​the program-controlled valve and the smooth discharge tank equipment, the step time cannot be reduced, and the regeneration effect cannot be achieved, so as to avoid the overall operation. performance, improving low-pressure desorption efficiency, and increasing the effect of regeneration time

Active Publication Date: 2008-09-10
SOUTHWEST RES & DESIGN INST OF CHEM IND
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Problems solved by technology

But on the other hand, the equipment investment and the corresponding floor area of ​​the program-controlled valve and the parallel discharge tank are increased. Different towers use different regulating valves for the parallel discharge flushing control, which makes the regeneration effect of each tower of the device slightly different.
Moreover, the process still adopts the method of pressure equalization to divide and deflate. To ensure a flushing and regeneration time of more than 90 seconds, the time for flushing and discharging is reduced to 30 seconds. At the same time, it must be divided into two times to complete. It is difficult to achieve three or more parallel and interleaved flushing processes, and a better regeneration effect cannot be achieved

Method used

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  • Multiple placing in turn interleaving flushing pressure variable adsorption technique
  • Multiple placing in turn interleaving flushing pressure variable adsorption technique
  • Multiple placing in turn interleaving flushing pressure variable adsorption technique

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Experimental program
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Effect test

Embodiment 110-2-4

[0042] Embodiment 110-2-4 / P process

[0043] This embodiment is a 10-tower pressure swing adsorption method for separating and recovering hydrogen from the shift gas. The operating pressure is 2.4MPa, the temperature is 40°C, the hydrogen content in the raw material gas to be processed is 70%, and the product hydrogen requires H 2 ≥99.9%.

[0044] As shown in Figure 1, the pressure swing adsorption device of this embodiment is divided into two series, wherein T0101, T0103, T0105, T0107, T0109 adsorption towers form a single series, and T0102, T0104, T0106, T0108, T0110 form a double series; One regulating valve PV101 and PV102 are respectively set up for the single and double series, and two regulating valves PV103 and PV104 are set between the two rows of parallel flushing program-controlled valves; manual cut-off valves are set before and after the two rows of parallel flushing regulating valves of the single and double series; Two on / off two-position program-controlled val...

Embodiment 212-3-5

[0054] Embodiment 212-3-5 / P process

[0055] This embodiment is a 12-tower pressure swing adsorption method for separating and recovering hydrogen from neutral gas. The operating pressure is 2.7MPa, the temperature is 40°C, the hydrogen content in the raw material gas to be processed is 70%, and the product hydrogen requires H 2 ≥99.9%.

[0056] The pressure swing adsorption device of this embodiment is divided into two series, wherein T0101, T0103, T0105, T0107, T0109, T0111 adsorption towers form a single series, and T0102, T0104, T0106, T0108, T0110, T0112 adsorption towers form a double series; For the single and double series, one control valve PV101 and PV102 are respectively set up, and two control valves PV103 and PV104 are set between the two rows of flushing program-controlled valves; two on / off two-position valves are installed on the outlet pipeline at the top of each adsorption tower. The program-controlled valve is used as the discharge outlet valve and the flus...

Embodiment 312-2-5

[0061] Embodiment 312-2-5 / P process

[0062] This embodiment is a 12-tower pressure swing adsorption method for separating and recovering hydrogen from neutral gas. The operating pressure is 2.7MPa, the temperature is 40°C, the hydrogen content in the raw material gas to be processed is 70%, and the product hydrogen requires H 2 ≥99.9%.

[0063] The pressure swing adsorption device of this embodiment is divided into two series, wherein T0101, T0103, T0105, T0107, T0109, T0111 adsorption towers form a single series, and T0102, T0104, T0106, T0108, T0110, T0112 adsorption towers form a double series; For the single and double series, one control valve PV101 and PV102 are respectively set up, and two control valves PV103 and PV104 are set between the two rows of flushing program-controlled valves; two on / off two-position valves are installed on the outlet pipeline at the top of each adsorption tower. The program-controlled valve is used as the discharge outlet valve and the flus...

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Abstract

The invention discloses a pressure swing adsorption (PSA) process for multiple placing sequentially and washing alternatively. At least four regulating valves alternately distributed are arranged on each outlet line on the top of an adsorption tower; two or more sequencing valves as a sequential outlet valves and washing outlet valves are arranged on each adsorption tower at the top of the adsorption tower and the sequential placing and the process of washing can be regulated so as to realize the sequential placing procedures of three times or more sequences and the alternative washing procedures of the corresponding times reversed sequences.. The pressure swing adsorption (PSA) process of the invention increases regeneration time, improves the desorption efficiency of impurity components, reduces the consumption of washing gas and increases the rate of products gas collecting; the cycle per minute time of the adsorption is reduced, which can reduce the investment of the equipment and occupation areas. while the performance difference arisen by adopting different control valves in the sequential placing and washing procedures in different adsorption towers is avoided, thus leading the sequential placing and washing procedures of each adsorption tower are completely identical and avoiding reducing the regeneration effect of the whole equipment due to the performance difference of the control valves, thereby avoiding reducing the whole operation performance of the equipment.

Description

technical field [0001] The invention relates to a pressure swing adsorption method, in particular to a pressure swing adsorption process with multiple releases and staggered flushing. Background technique [0002] The Pressure Swing Adsorption (PSA) method refers to the method of using porous solid adsorbent to selectively adsorb different components in the mixed gas under a certain pressure to realize the separation of the mixed gas. Because the method has the characteristics of simple process, flexible scale, convenient operation, high degree of automation, low investment and low energy consumption, it has developed rapidly since the successful development of pressure swing adsorption technology, and is constantly tending to maturity and perfection. With the large-scale development of pressure swing adsorption devices, the product volume from the early hundreds of standard cubic meters / hour to tens of thousands of standard cubic meters / hour, especially the super-large PSA ...

Claims

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Application Information

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IPC IPC(8): B01D53/047
Inventor 殷文华李克兵曾凡华马学军张宏宇郜豫川
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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