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Pressure swing adsorption hydrogen production process

A pressure swing adsorption and process technology, applied in the field of coal chemical industry, can solve the problems of vacuum pump power consumption, high water consumption, packing seal leakage, and affecting the operation of working conditions, so as to reduce the workload, reduce the sound of device operation, and improve safe operation index effect

Pending Publication Date: 2021-05-04
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the adsorbent regeneration of this technology is realized by vacuum pumping negative pressure. Not only the power consumption and water consumption of the vacuum pump are high, but the packing seal often leaks, and it is easy to carry water, causing the fuel gas and the adsorption tower to carry water, which affects the operation of the working conditions. ;There is a negative pressure stage in the operating condition. If there is a device leakage, air may be sucked from the leak during the negative pressure period, causing an explosion.

Method used

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Embodiment 1

[0061] Feed gas (fresh synthesis gas, oil-washed dry gas) with a pressure of 2.0Mpa and a temperature of ≤40°C figure 1 and figure 2 The pressure swing adsorption system shown. The pressure swing adsorption system consists of 8 adsorption towers, 1 desorption gas buffer tank, 1 desorption gas mixing tank, 65 program-controlled valves and multiple regulating valves. The main process flow adopts 8-2-3 / P process, that is, 8 online working towers, 2 towers of adsorption, 3 times of pressure equalization, and washing and regeneration processes.

[0062] The specific operating parameters are shown in Table 1:

[0063]

[0064] In Table 1, 1 to 13 represent adsorption (1), first-stage pressure equalization drop (2), second-stage pressure equalization drop (3), third-stage pressure equalization drop (4), first forward discharge Pressure (5), second forward pressure release (6), reverse pressure release (7), first backwash (8), second backwash (9), third stage pressure equalizat...

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Abstract

The invention provides a pressure swing adsorption hydrogen production process which is characterized in that eight on-line adsorption towers are arranged when a system runs; each adsorption tower is sequentially subjected to adsorption, first-stage pressure balanced drop, second-stage pressure balanced drop, third-stage pressure balanced drop, forward pressure release, reverse pressure release, backwashing, third-stage pressure balanced rise, second-stage pressure balanced rise, first-stage pressure balanced rise and final pressure rise; and the pressure swing adsorption hydrogen production process is divided into eight sub-periods according to the system operation time, the difference of the process steps of the two adjacent online adsorption towers is one sub-period, and two adjacent adsorption towers are in the adsorption step at any moment. The pressure swing adsorption hydrogen production process provided by the invention not only realizes the purposes of energy conservation and consumption reduction, but also ensures the positive pressure operation condition and reduces the running safety risk.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a pressure swing adsorption hydrogen production process. Background technique [0002] PSA hydrogen production: Pressure Swing Adsorption (PSA for short) is based on the physical adsorption of gas molecules on the internal surface of the adsorbent (porous solid substance), and the adsorbent can easily adsorb high boiling point components, It is not easy to adsorb low boiling point components and the adsorption amount of the adsorbed components increases under high pressure, and the adsorption amount decreases under low pressure to realize the separation of impurities. [0003] When the raw material gas passes through the adsorbent bed under a certain pressure, the high boiling point impurity components in the raw material gas are selectively adsorbed, and the low boiling point components are discharged from the outlet of the adsorption tower as purified...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/56B01D53/047
CPCB01D53/047C01B3/56C01B2203/043
Inventor 陈小龙孙治国闫成东张志功毕冬冬周俊歧包仁望高广平张志华
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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