Pressure swing adsorption gas production system and pressure swing adsorption gas production method
A technology of pressure swing adsorption and adsorption tower, which is applied in the field of pressure swing adsorption, which can solve the problems of long service life of adsorbents, inability to produce at the same time, large operating flexibility, etc., and achieve the effects of environmental friendliness, energy saving and process improvement
Inactive Publication Date: 2014-09-24
YANGGU XIANGGUANG COPPER
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Problems solved by technology
[0009] ⑤ The device has strong adjustment ability and large operating flexibility
[0011] ⑦The adsorbent has a long service life
[0014] However, the current pressure swing adsorption process can only produce oxygen or nitrogen alone, and the two cannot be produced at the same time
Method used
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[0131] use figure 2 The pressure swing adsorption gas production system shown uses air as raw material to produce oxygen and nitrogen at the same time. For the settings of some valves, see image 3 For the process steps of oxygen production and the switch states of the valves, see Table 1. Table 1 is a list of process steps and valve switch states during pressure swing adsorption oxygen production in the embodiment of the present application.
[0132] Table 1 Table of process steps and valve switch status during pressure swing adsorption oxygen production in the embodiment of this application
[0133]
[0134]
[0135] Note: On means the valve is open, C means the valve is closed.
[0136] Step 1: Adsorption in adsorption tower A5, vacuuming in adsorption tower B6
[0137] Open the program-controlled valve into 1, out of 1, out of 1 (not in image 3 It is shown in , which is the vent valve of the first adsorption device) and true 2, close side 1 and uniform 1.
[0...
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The application provides a pressure swing adsorption gas production system comprising a gas supply device, a blower, a first adsorption device, a vacuum pump and a second adsorption device, wherein the gas supply device is used for providing raw material air; the blower is connected with the air supply device; the air inlet of the first adsorption device is connected with the blower by virtue of a first air inlet valve, and the first adsorption device is provided with a first product gas outlet and a vacuum-pumping gas opening; the vacuum pump is connected with the vacuum-pumping gas opening of the first adsorption device by virtue of a vacuum-pumping valve; the air inlet of the second adsorption device is connected with the vacuum pump by virtue of a second air inlet valve, and the second adsorption device is provided with a second product gas outlet. Correspondingly, the application also provides a pressure swing adsorption gas production method. According to the pressure swing adsorption gas production system and the pressure swing adsorption gas production method provided by the application, the blower of a nitrogen production part is replaced by the vacuum pump of an oxygen production part, and meanwhile nitrogen-enriched waste gas of the oxygen production part is utilized, so that oxygen and nitrogen can be produced at the same time, and the economic benefits can be increased; the pressure swing adsorption gas production system and the pressure swing adsorption gas production method have the characteristics of low equipment investment, energy consumption conservation, environmental friendliness and the like.
Description
technical field [0001] The present application relates to the technical field of pressure swing adsorption, in particular to a pressure swing adsorption gas production system and its method. Background technique [0002] Air separation, referred to as air separation, is the process of separating oxygen, nitrogen or rare gases from air by using the different physical properties of the various components in the air and using methods such as deep freezing, adsorption and membrane separation. Among them, the application of air separation adsorption device is becoming more and more extensive. Pressure Swing Absorption (PSA) is a method of combining pressure and decompression. It usually adopts an adsorption-desorption system consisting of pressure adsorption and decompression desorption. Specifically, under isothermal conditions, the combination of pressure adsorption and decompression desorption forms an adsorption operation cycle process. During the pressurization process, th...
Claims
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Inventor 孙伟
Owner YANGGU XIANGGUANG COPPER