High-efficiency hydrogen recovery device and recovery method

Abstract

The invention discloses a high-efficiency hydrogen recovery device and method.The recovery device comprises a front buffer tank, a draught fan and a rear buffer tank which are sequentially arranged and communicated together through a pipeline, the top of the rear buffer tank is connected with a hydrogen analyzer, and the bottom of the rear buffer tank is connected with a high-purity hydrogen supplementing pipeline; the hydrogen analyzer is electrically connected with the system controller; during hydrogen recovery operation, industrial tail gas is collected into the front buffer tank through the tail gas collecting pipeline and conveyed into the rear buffer tank through operation of the fan; and then, the hydrogen analyzer analyzes the purity of the gas in the rear buffer tank, and the hydrogen regulating valve is controlled to be opened and closed through the system controller, so that stable-purity hydrogen is obtained. According to the present invention, the concept is ingenious, the hydrogen concentration is rapidly adjusted by adding the hydrogen analyzer and the high-purity hydrogen supplementing pipeline, and the volume of the buffer tank is effectively reduced so as to save the occupied area of the device and reduce the manufacturing cost of the device.

Description

technical field [0001] The invention relates to the field of hydrogen recovery devices, in particular to a high-efficiency hydrogen recovery device. Background technique [0002] The hydrogen recovery device is used in metallurgy and petrochemical industries. During the production process, the main production medium needs reduction reaction or oxygen isolation treatment. When the reducing agent or protective gas used is hydrogen, the purity of hydrogen as a medium is relatively high, and when it is used in large quantities, it is necessary to recover and purify the discharged hydrogen mixed with impurities to improve the efficiency of hydrogen use. At the same time, hydrogen, as a new energy source, also has high commercial value. [0003] In the process of collecting hydrogen-rich tail gas, it is found that the content of hydrogen in the tail gas is not constant, and there may be a wide range of changes. For example, when the tail gas is collected intensively, the hydrogen...

AI Technical Summary

Problems solved by technology

The advantage is that the purity range of the exhaust gas can be relatively stable, which is convenient for the secondary purification treatment of the later equipment. The disadvantage is that the buffer tank is 3 to 5 times larger than the conventional equipment

Due to the low exhaust gas pressure, generally a slight positive pressure of 1KPa, this conventional solution greatly increases the equipment footprint and equipment cost

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