Variable pressure absorption separation system and method for supercritical water gasification hydrogen-making gas-phase product

Abstract

The invention discloses a variable pressure absorption separation system for a supercritical water gasification hydrogen-making gas-phase product. An outlet of a supercritical water gasification reactor is connected to a hot fluid side inlet of a heat exchanger, a hot fluid side outlet of the heat exchanger is connected to an inlet of a three-phase separator, reaction materials enter the supercritical water gasification reactor along a cold fluid side of the heat exchanger, a liquid phase outlet and a solid phase outlet of the three-phase separator are connected to a subsequent unit, a gas phase outlet is connected to an inlet of a pressure regulator, an outlet of the pressure regulator is connected to an inlet of a high-pressure water absorber 1, a gas phase outlet of the high-pressure water absorber 1 is divided into two paths after passing through a gas path valve 1 and a gas pressure reducing valve in sequence, one path is connected to a high-purity H pipeline through a gas path valve 2, the other path is connected to an inlet of a depth separator through a gas path valve 3, and a liquid phase outlet of the high-pressure water absorber 1 is connected to an inlet of a CO2 resolver through a liquid pressure reducing valve, and a liquid phase outlet of the CO2 resolver is connected back to the high-pressure water absorber 1 through a waterway valve 1. According to the invention, step-by-step variable-pressure absorption and separation of a gas phase product can be realized under a high-pressure condition, and the energy utilization efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of hydrogen production by supercritical water gasification, and in particular relates to a pressure swing absorption separation system and method for gas phase products of hydrogen production by supercritical water gasification. Background technique [0002] With the depletion of fossil energy and the continuous deterioration of the environment, it is urgent to find a new type of non-polluting energy as a substitute for fossil fuels. The development of hydrogen energy has become a consensus in energy transition. Hydrogen energy has attracted people's attention because of its absolutely pollution-free combustion characteristics, so various hydrogen production processes have emerged as the times require. The general hydrogen production process or resource waste is serious, or the hydrogen production rate is low and cannot be widely promoted. However, the supercritical water gasification hydrogen production pro...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the disadvantages of the above-mentioned prior art that can only perform gas separation under low pressure conditions and waste a large amount of pressure energy of the system, the purpose of the present invention is to provide a pressure swing absorption separation system and method for supercritical water gasification to produce hydrogen gas phase products, It can realize step-by-step pressure-swing absorption and separation of gas phase products under high pressure conditions, reduce the equipment cost of supercritical water gasification system, improve energy utilization efficiency, reduce energy input of gas phase product separation system, and realize high efficiency and high efficiency of gas phase products of supercritical water gasification system. low energy separation

Images