Pressure swing adsorption nitrogen making device capable of replacing membrane separation nitrogen making

Abstract

The invention provides a pressure swing adsorption nitrogen making device capable of replacing membrane separation nitrogen making and relates to the field of air separation nitrogen making. The device is composed of adsorption tower sets, gas inlet and outlet pipelines and valves, an electronic control pneumatic system and the like. The adsorption tower sets can be composed of two or three or four and even more towers. Conventional adsorption towers are made into unpressurized vessel type adsorption towers easy to replace, and the adsorption towers are assembled through high-pressure carbon molecular sieves, threads and hoses and assembled by referring to a membrane barrel combination mode. The adsorption towers can be filled with the molecular sieves with different pressure bearing capacities according to the requirements of users, one device can be composed of the multiple adsorption tower sets, each adsorption tower is provided with independent gas inlet, outlet and exhaust valves and pipelines connected with main gas inlet, outlet and exhaust pipelines, replacement and maintenance of each adsorption tower can be achieved, modular assembly is achieved, and maintenance and replacement are convenient for the users. The adsorption towers are low in weight and convenient to replace, the device is assembled in a modular mode, the gas outlet pressure of nitrogen reaches up to 1.5 MPa, the device can completely replace membrane separation nitrogen making, and the requirements of the users are met.

Description

technical field [0001] The invention relates to the field of air separation nitrogen production, in particular to a pressure swing adsorption nitrogen production device (referred to as a PSA nitrogen production device) which can replace membrane nitrogen production. Background technique [0002] Membrane separation nitrogen production technology is to use polymer hollow fiber membranes to separate nitrogen, oxygen and other gases in the air to produce nitrogen or Oxygen technology. Its advantages: fast gas production, small footprint and easy maintenance. Disadvantages: 1. The replacement cost of membrane tanks for membrane separation nitrogen production is high. Compared with pressure swing adsorption, membrane tanks have higher requirements for the pre-treatment of air. Under the same gas production, membrane separation nitrogen production costs more than PSA nitrogen production equipment. 2. The purity of membrane separation nitrogen production is only suitable for occa...

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Problems solved by technology

[0004] The present invention combines the characteristics of two kinds of nitrogen production technologies, and on the basis of PSA nitrogen production, a pressure swing adsorption nitrogen production device that can replace membrane separation nitrogen production is invented. The pressure swing adsorption nitrogen production device has the advantages of PSA on the one hand, and solves the problem of It overcomes the shortcomings of its large footprint, and at the same time has the advantages of membrane separation for nitrogen production, and is easy to maintain

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